[User] Show me all active customers created in the last 30 days.

[Assistant]
SELECT *
FROM financial_services.customers
WHERE status = 'Active'
  AND created_at >= CURRENT_DATE - INTERVAL '30 days';

[User] Exclude any customers without a phone_number.

[Assistant]
SELECT *
FROM financial_services.customers
WHERE status = 'Active'
  AND created_at >= CURRENT_DATE - INTERVAL '30 days'
  AND phone_number IS NOT NULL;

[User] Only return customer_id and email, sorted by created_at descending.

[Assistant]
SELECT customer_id, email
FROM financial_services.customers
WHERE status = 'Active'
  AND created_at >= CURRENT_DATE - INTERVAL '30 days'
  AND phone_number IS NOT NULL
ORDER BY created_at DESC;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE financial_services.customers (
    customer_id character varying(64) NOT NULL,  -- unique identifier for the customer
    first_name character varying(100) NOT NULL, -- customer's first name
    last_name character varying(100) NOT NULL, -- customer's last name
    date_of_birth date NOT NULL, -- customer's date of birth
    ssn_hash character varying(128), -- hashed social security number (or national ID)
    address text NOT NULL, -- customer's primary address
    city character varying(100) NOT NULL,
    state character varying(50) NOT NULL,
    zip_code character varying(20) NOT NULL,
    country character varying(50) NOT NULL,
    email character varying(128) UNIQUE, -- customer's email address
    phone_number character varying(32),
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- timestamp of customer record creation
    status character varying(32) NOT NULL, -- e.g., Active, Inactive, Pending Verification
    risk_profile character varying(50), -- e.g., Low, Medium, High
    PRIMARY KEY (customer_id)
)


[User] What is the total count of blocks and the average difficulty?

[Assistant] SELECT COUNT(*), AVG(difficulty) FROM blockchain.blocks

[User] Now, show me the total count and average difficulty only for blocks created in the year 2023.

[Assistant] SELECT COUNT(*), AVG(difficulty) FROM blockchain.blocks WHERE timestamp >= '2023-01-01' AND timestamp < '2024-01-01'

System:
You are an expert in writing database language. You can write a corresponding database language query to answer the user's question based on the table structure described by the table creation statement.
##Table Structure
CREATE TABLE blockchain.blocks ( block_id text PRIMARY KEY, previous_block_id text, timestamp timestamp, nonce int, merkle_root text, difficulty int )


[User] List each product_type along with the most expensive active product in that type, showing product_type, product_id, product_name, and base_premium.

[Assistant]
SELECT product_type, product_id, product_name, base_premium
FROM (
  SELECT product_type, product_id, product_name, base_premium,
         ROW_NUMBER() OVER (PARTITION BY product_type ORDER BY base_premium DESC) AS rn
  FROM insurance.insurance_products
  WHERE is_active = true
) t
WHERE rn = 1;

[User] Actually, format the result to only include product types where the max base_premium exceeds 2000.

[Assistant]
SELECT product_type, product_id, product_name, base_premium
FROM (
  SELECT product_type, product_id, product_name, base_premium,
         ROW_NUMBER() OVER (PARTITION BY product_type ORDER BY base_premium DESC) AS rn
  FROM insurance.insurance_products
  WHERE is_active = true
) t
WHERE rn = 1
  AND base_premium > 2000;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE insurance.insurance_products ( product_id character varying(64) NOT NULL, product_name character varying(150) NOT NULL, product_type character varying(50) NOT NULL, description text, base_premium numeric(10, 2) NOT NULL, coverage_details text, underwriting_rules text, is_active boolean NOT NULL DEFAULT true, created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, updated_at timestamp, PRIMARY KEY (product_id) )


[User] I need a list of claim_ids that have at least one document of type 'Photo' and at least one of type 'Invoice'.

[Assistant]
SELECT DISTINCT cd.claim_id
FROM insurance.claim_documents cd
WHERE cd.document_type IN ('Photo', 'Invoice');

[User] It returns claim_ids that have either a Photo or an Invoice but not necessarily both. I need only those with both types.

[Assistant]
SELECT cd.claim_id
FROM insurance.claim_documents cd
WHERE cd.document_type IN ('Photo', 'Invoice')
GROUP BY cd.claim_id
HAVING COUNT(DISTINCT cd.document_type) = 2;

[User] Actually, I only want those documents uploaded in 2024.

[Assistant]
SELECT cd.claim_id
FROM insurance.claim_documents cd
WHERE cd.document_type IN ('Photo', 'Invoice')
  AND cd.uploaded_at >= '2024-01-01'
GROUP BY cd.claim_id
HAVING COUNT(DISTINCT cd.document_type) = 2;

[User] Also, I'd like to see the policy_number and incident_date for these claims.

[Assistant]
SELECT c.claim_id, p.policy_number, c.incident_date
FROM (
  SELECT cd.claim_id
  FROM insurance.claim_documents cd
  WHERE cd.document_type IN ('Photo', 'Invoice')
    AND cd.uploaded_at >= '2024-01-01'
  GROUP BY cd.claim_id
  HAVING COUNT(DISTINCT cd.document_type) = 2
) AS filtered
JOIN insurance.claims c ON filtered.claim_id = c.claim_id
JOIN insurance.policies p ON c.policy_id = p.policy_id;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE insurance.customers (
    customer_id character varying(64) NOT NULL,  -- unique identifier for the customer
    first_name character varying(100) NOT NULL, -- customer's first name
    last_name character varying(100) NOT NULL, -- customer's last name
    date_of_birth date NOT NULL, -- customer's date of birth
    ssn_hash character varying(128), -- Hashed social security number (or national ID)
    address_line1 character varying(255) NOT NULL,
    address_line2 character varying(255),
    city character varying(100) NOT NULL,
    state character varying(50) NOT NULL,
    zip_code character varying(20) NOT NULL,
    country character varying(50) NOT NULL DEFAULT 'USA',
    phone_number character varying(30),
    email character varying(128) UNIQUE, -- unique email address
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- when the customer record was created
    updated_at timestamp, -- when the customer record was last updated
    status character varying(20) NOT NULL DEFAULT 'Active', -- e.g., Active, Inactive, Prospect
    PRIMARY KEY (customer_id)
)
CREATE TABLE insurance.policies (
    policy_id character varying(64) NOT NULL, -- unique identifier for the policy
    customer_id character varying(64) NOT NULL, -- identifier for the policyholder (FK to customers)
    product_id character varying(64) NOT NULL, -- identifier for the insurance product (FK to insurance_products)
    agent_id character varying(64), -- identifier for the agent who sold the policy (FK to agents)
    policy_number character varying(100) NOT NULL UNIQUE, -- customer-facing policy number
    start_date date NOT NULL, -- date the policy coverage begins
    end_date date NOT NULL, -- date the policy coverage ends
    premium_amount numeric(12, 2) NOT NULL, -- total premium for the policy term
    coverage_limit numeric(15, 2) NOT NULL, -- maximum amount covered
    deductible numeric(10, 2) NOT NULL, -- amount customer pays before coverage kicks in
    status character varying(30) NOT NULL, -- e.g., Active, Expired, Cancelled, Pending
    issued_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- when the policy was issued
    cancellation_date date,
    cancellation_reason text,
    PRIMARY KEY (policy_id)
)
CREATE TABLE insurance.claims (
    claim_id character varying(64) NOT NULL, -- unique identifier for the claim
    policy_id character varying(64) NOT NULL, -- identifier of the policy under which the claim is made (FK to policies)
    customer_id character varying(64) NOT NULL, -- identifier of the customer making the claim (FK to customers)
    incident_date timestamp NOT NULL, -- date and time of the incident leading to the claim
    reported_date timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- date the claim was reported
    description text NOT NULL, -- detailed description of the incident and claim
    estimated_loss numeric(15, 2), -- initial estimated cost of the loss
    status character varying(30) NOT NULL, -- e.g., Filed, Processing, Under Review, Approved, Denied, Settled
    settlement_amount numeric(15, 2), -- final amount paid out
    settlement_date date,
    claim_handler_id character varying(64), -- identifier for the employee handling the claim (FK to employees/adjusters)
    police_report_number character varying(100),
    PRIMARY KEY (claim_id)
)
CREATE TABLE insurance.insurance_products (
    product_id character varying(64) NOT NULL, -- unique identifier for the insurance product
    product_name character varying(150) NOT NULL, -- name of the insurance product (e.g., 'Comprehensive Auto Insurance')
    product_type character varying(50) NOT NULL, -- category like 'Auto', 'Home', 'Life', 'Health', 'Travel'
    description text, -- detailed description of the product
    base_premium numeric(10, 2) NOT NULL, -- starting premium before adjustments
    coverage_details text, -- details about what is covered (could be JSON or structured text)
    underwriting_rules text, -- rules used for assessing risk and eligibility
    is_active boolean NOT NULL DEFAULT true, -- whether the product is currently offered
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at timestamp,
    PRIMARY KEY (product_id)
)
CREATE TABLE insurance.agents (
    agent_id character varying(64) NOT NULL, -- unique identifier for the agent
    first_name character varying(100) NOT NULL,
    last_name character varying(100) NOT NULL,
    agency_name character varying(150),
    license_number character varying(100) NOT NULL UNIQUE, -- state insurance license number
    license_state character varying(50) NOT NULL,
    contact_email character varying(128) UNIQUE,
    contact_phone character varying(30),
    hire_date date,
    termination_date date,
    status character varying(20) NOT NULL DEFAULT 'Active', -- e.g., Active, Terminated, On Leave
    commission_rate numeric(5, 4) NOT NULL DEFAULT 0.05, -- percentage commission
    manager_id character varying(64), -- identifier for the agent's manager (FK to agents or employees)
    PRIMARY KEY (agent_id)
)
CREATE TABLE insurance.claim_documents (
    document_id character varying(64) NOT NULL, -- unique identifier for the document
    claim_id character varying(64) NOT NULL, -- identifier of the claim this document relates to (FK to claims)
    document_type character varying(50) NOT NULL, -- e.g., Police Report, Photo, Invoice, Medical Bill
    file_name character varying(255) NOT NULL, -- original name of the uploaded file
    file_path character varying(512) NOT NULL, -- storage path (e.g., S3 URL, network path)
    file_size_bytes integer, -- size of the file in bytes
    mime_type character varying(100), -- MIME type of the file (e.g., 'image/jpeg', 'application/pdf')
    uploaded_by character varying(64), -- identifier of the user/system who uploaded (FK to users/customers)
    uploaded_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- time of upload
    description text, -- optional description of the document
    PRIMARY KEY (document_id)
)
CREATE TABLE insurance.policy_beneficiaries (
    beneficiary_id character varying(64) NOT NULL, -- unique identifier for the beneficiary entry
    policy_id character varying(64) NOT NULL, -- identifier of the life/relevant policy (FK to policies)
    customer_id character varying(64) NOT NULL, -- identifier of the beneficiary (could be FK to customers or store info directly)
    first_name character varying(100) NOT NULL, -- beneficiary first name (if not linking to customers table)
    last_name character varying(100) NOT NULL, -- beneficiary last name
    relationship character varying(50) NOT NULL, -- relationship to the policyholder (e.g., Spouse, Child, Parent)
    percentage_share numeric(5, 2) NOT NULL CHECK (percentage_share > 0 AND percentage_share <= 100), -- percentage of payout
    contact_info text, -- contact details for the beneficiary
    added_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (beneficiary_id),
    UNIQUE (policy_id, customer_id) -- Ensure a person is listed only once per policy
)


[User] Show me all active policies with coverage limits above $1,000,000, along with the customer names and agent names, sorted by coverage limit in descending order.

[Assistant] SELECT p.policy_id, p.customer_id, p.agent_id, p.coverage_limit, p.premium_amount, p.start_date, p.end_date FROM insurance.policies p WHERE p.status = 'active' AND p.coverage_limit > 1000000 ORDER BY p.coverage_limit DESC;

[User] Actually, I need to see the customer's first and last name from the customers table and the agent's full name from the agents table as well.

[Assistant] SELECT p.policy_id, p.coverage_limit, p.premium_amount, c.first_name AS customer_first_name, c.last_name AS customer_last_name, a.first_name AS agent_first_name, a.last_name AS agent_last_name FROM insurance.policies p JOIN insurance.customers c ON p.customer_id = c.customer_id JOIN insurance.agents a ON p.agent_id = a.agent_id WHERE p.status = 'active' AND p.coverage_limit > 1000000 ORDER BY p.coverage_limit DESC;

[User] Now I also want to see the total number of claims each of these high-coverage policies has had.

[Assistant] SELECT p.policy_id, p.coverage_limit, p.premium_amount, c.first_name AS customer_first_name, c.last_name AS customer_last_name, a.first_name AS agent_first_name, a.last_name AS agent_last_name, COUNT(cl.claim_id) AS total_claims FROM insurance.policies p JOIN insurance.customers c ON p.customer_id = c.customer_id JOIN insurance.agents a ON p.agent_id = a.agent_id LEFT JOIN insurance.claims cl ON p.policy_id = cl.policy_id WHERE p.status = 'active' AND p.coverage_limit > 1000000 GROUP BY p.policy_id, p.coverage_limit, p.premium_amount, c.first_name, c.last_name, a.first_name, a.last_name ORDER BY p.coverage_limit DESC;

[User] Finally, filter these results to only show policies that have at least one claim and include the average settlement amount for those claims.

[Assistant] SELECT p.policy_id, p.coverage_limit, p.premium_amount, c.first_name AS customer_first_name, c.last_name AS customer_last_name, a.first_name AS agent_first_name, a.last_name AS agent_last_name, COUNT(cl.claim_id) AS total_claims, AVG(cl.settlement_amount) AS avg_settlement FROM insurance.policies p JOIN insurance.customers c ON p.customer_id = c.customer_id JOIN insurance.agents a ON p.agent_id = a.agent_id JOIN insurance.claims cl ON p.policy_id = cl.policy_id WHERE p.status = 'active' AND p.coverage_limit > 1000000 GROUP BY p.policy_id, p.coverage_limit, p.premium_amount, c.first_name, c.last_name, a.first_name, a.last_name HAVING COUNT(cl.claim_id) > 0 ORDER BY p.coverage_limit DESC;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE insurance.policies ( policy_id.text, customer_id.text, product_id.text, agent_id.text, policy_number.text, start_date.date, end_date.date, premium_amount.numeric, coverage_limit.numeric, deductible.numeric, status.text, issued_at.timestamp, cancellation_date.date, cancellation_reason.text )
CREATE TABLE insurance.claims ( claim_id.text, policy_id.text, customer_id.text, incident_date.timestamp, reported_date.timestamp, description.text, estimated_loss.numeric, status.text, settlement_amount.numeric, settlement_date.date, claim_handler_id.text, police_report_number.text )
CREATE TABLE insurance.premium_payments ( payment_id.text, policy_id.text, customer_id.text, payment_date.timestamp, amount_paid.numeric, payment_method.text, transaction_reference.text, due_date.date, payment_period_start.date, payment_period_end.date, status.text )


[User] Find all blocks with difficulty above 5000 and include their timestamp.

[Assistant] SELECT block_id, timestamp FROM blockchain.blocks WHERE difficulty > 5000;

[User] Now show me the count of such blocks grouped by month in 2023.

[Assistant] SELECT DATE_TRUNC('month', timestamp) AS month, COUNT(*) AS block_count FROM blockchain.blocks WHERE difficulty > 5000 AND timestamp BETWEEN '2023-01-01' AND '2023-12-31' GROUP BY month ORDER BY month;

[User] Actually, I want to see the average difficulty for each of these months as well.

[Assistant] SELECT DATE_TRUNC('month', timestamp) AS month, COUNT(*) AS block_count, AVG(difficulty) AS avg_difficulty FROM blockchain.blocks WHERE difficulty > 5000 AND timestamp BETWEEN '2023-01-01' AND '2023-12-31' GROUP BY month ORDER BY month;

[User] Can you modify this to also include the block_id with the highest difficulty for each month?

[Assistant] WITH monthly_stats AS (SELECT DATE_TRUNC('month', timestamp) AS month, COUNT(*) AS block_count, AVG(difficulty) AS avg_difficulty FROM blockchain.blocks WHERE difficulty > 5000 AND timestamp BETWEEN '2023-01-01' AND '2023-12-31' GROUP BY month) SELECT ms.month, ms.block_count, ms.avg_difficulty, (SELECT b.block_id FROM blockchain.blocks b WHERE DATE_TRUNC('month', b.timestamp) = ms.month AND b.difficulty > 5000 ORDER BY b.difficulty DESC LIMIT 1) AS highest_diff_block_id FROM monthly_stats ms ORDER BY ms.month;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE blockchain.blocks ( block_id text PRIMARY KEY, previous_block_id text, timestamp timestamp, nonce int, merkle_root text, difficulty int )
CREATE TABLE blockchain.addresses ( address_id text PRIMARY KEY, public_key text, balance numeric )
CREATE TABLE blockchain.smart_contracts ( contract_id text PRIMARY KEY, creator_address text, code text, timestamp timestamp )


[User] Show a list of all game developers with their name and founded year.

[Assistant]
SELECT
  name,
  founded_year
FROM gaming_technology.developers;

[User] Please filter the list to only include developers founded in the year 1998.

[Assistant]
SELECT
  name,
  founded_year
FROM gaming_technology.developers
WHERE
  founded_year = 1998;

[User] Can you also include the number of games each of these developers has released?

[Assistant]
SELECT
  T1.name,
  T1.founded_year,
  COUNT(T2.game_id) AS game_count
FROM gaming_technology.developers AS T1
LEFT JOIN gaming_technology.games AS T2
  ON T1.developer_id = T2.developer_id
WHERE
  T1.founded_year = 1998
GROUP BY
  T1.developer_id,
  T1.name,
  T1.founded_year;

[User] Now, only show the developers who have released exactly 2 games.

[Assistant]
SELECT
  T1.name,
  T1.founded_year,
  COUNT(T2.game_id) AS game_count
FROM gaming_technology.developers AS T1
JOIN gaming_technology.games AS T2
  ON T1.developer_id = T2.developer_id
WHERE
  T1.founded_year = 1998
GROUP BY
  T1.developer_id,
  T1.name,
  T1.founded_year
HAVING
  COUNT(T2.game_id) = 2;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE gaming_technology.players (
    player_id uuid NOT NULL DEFAULT gen_random_uuid(), -- unique identifier for the player
    username character varying(100) NOT NULL UNIQUE, -- player's chosen display name
    email character varying(255) NOT NULL UNIQUE, -- player's email address for login/recovery
    password_hash text NOT NULL, -- securely hashed password
    registration_date timestamp with time zone NOT NULL DEFAULT CURRENT_TIMESTAMP, -- when the player account was created
    last_login timestamp with time zone, -- timestamp of the last successful login
    country_code character(2), -- player's country (ISO 3166-1 alpha-2)
    status character varying(20) NOT NULL DEFAULT 'active', -- account status (e.g., active, banned, suspended)
    profile_data jsonb, -- flexible field for avatar url, bio, preferences etc.
    PRIMARY KEY (player_id)
)
CREATE TABLE gaming_technology.games (
    game_id uuid NOT NULL DEFAULT gen_random_uuid(), -- unique identifier for the game
    title character varying(200) NOT NULL, -- official title of the game
    developer_id uuid NOT NULL, -- FK linking to the developers table
    publisher_id uuid, -- FK linking to a potential publishers table (optional)
    genre character varying(100), -- primary genre (e.g., RPG, FPS, Strategy)
    release_date date, -- official release date
    description text, -- short description or synopsis of the game
    platform character varying(50) NOT NULL, -- primary platform (e.g., PC, PlayStation 5, Xbox Series X, Mobile)
    engine character varying(100), -- game engine used (e.g., Unreal Engine 5, Unity)
    website character varying(255), -- official website URL
    PRIMARY KEY (game_id)
    -- FOREIGN KEY (developer_id) REFERENCES gaming_technology.developers(developer_id) -- Example FK constraint
)
CREATE TABLE gaming_technology.developers (
    developer_id uuid NOT NULL DEFAULT gen_random_uuid(), -- unique identifier for the developer studio
    name character varying(150) NOT NULL UNIQUE, -- name of the development studio
    country character varying(100), -- country where the studio is based
    founded_year integer, -- year the studio was founded
    website character varying(255), -- developer's official website
    created_at timestamp with time zone NOT NULL DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (developer_id)
)
CREATE TABLE gaming_technology.game_sessions (
    session_id uuid NOT NULL DEFAULT gen_random_uuid(), -- unique identifier for the game session
    player_id uuid NOT NULL, -- FK linking to the players table
    game_id uuid NOT NULL, -- FK linking to the games table
    server_id uuid, -- FK linking to the servers table (nullable for single-player)
    start_time timestamp with time zone NOT NULL DEFAULT CURRENT_TIMESTAMP, -- when the session began
    end_time timestamp with time zone, -- when the session ended (null if ongoing)
    duration_seconds integer, -- calculated duration of the session in seconds
    score integer, -- player's score for the session, if applicable
    session_data jsonb, -- flexible field for session-specific info (e.g., map played, character used)
    PRIMARY KEY (session_id)
    -- FOREIGN KEY (player_id) REFERENCES gaming_technology.players(player_id),
    -- FOREIGN KEY (game_id) REFERENCES gaming_technology.games(game_id),
    -- FOREIGN KEY (server_id) REFERENCES gaming_technology.servers(server_id)
)
CREATE TABLE gaming_technology.servers (
    server_id uuid NOT NULL DEFAULT gen_random_uuid(), -- unique identifier for the game server instance
    game_id uuid NOT NULL, -- FK linking to the game this server hosts
    server_name character varying(150), -- display name for the server
    region character varying(50) NOT NULL, -- geographical region (e.g., us-east-1, eu-west-2)
    ip_address character varying(45), -- IP address (IPv4 or IPv6)
    port integer, -- network port number
    current_players integer NOT NULL DEFAULT 0, -- number of players currently connected
    max_players integer NOT NULL, -- maximum player capacity
    status character varying(30) NOT NULL DEFAULT 'offline', -- server status (e.g., online, offline, maintenance)
    last_heartbeat timestamp with time zone, -- last time the server reported its status
    PRIMARY KEY (server_id)
    -- FOREIGN KEY (game_id) REFERENCES gaming_technology.games(game_id)
)
CREATE TABLE gaming_technology.achievements (
    achievement_id uuid NOT NULL DEFAULT gen_random_uuid(), -- unique identifier for an achievement definition
    game_id uuid NOT NULL, -- FK linking to the game the achievement belongs to
    name character varying(150) NOT NULL, -- name of the achievement
    description text NOT NULL, -- how to unlock the achievement
    icon_url character varying(255), -- URL for the achievement's icon
    points integer DEFAULT 0, -- points awarded for unlocking (optional)
    hidden boolean DEFAULT false, -- whether the achievement details are hidden until unlocked
    PRIMARY KEY (achievement_id)
    -- FOREIGN KEY (game_id) REFERENCES gaming_technology.games(game_id)
)
CREATE TABLE gaming_technology.player_achievements (
    player_achievement_id uuid NOT NULL DEFAULT gen_random_uuid(), -- unique identifier for this unlock instance
    player_id uuid NOT NULL, -- FK linking to the player who unlocked it
    achievement_id uuid NOT NULL, -- FK linking to the achievement definition
    unlocked_at timestamp with time zone NOT NULL DEFAULT CURRENT_TIMESTAMP, -- when the achievement was unlocked
    PRIMARY KEY (player_achievement_id),
    UNIQUE (player_id, achievement_id) -- Ensure a player can only unlock an achievement once
    -- FOREIGN KEY (player_id) REFERENCES gaming_technology.players(player_id),
    -- FOREIGN KEY (achievement_id) REFERENCES gaming_technology.achievements(achievement_id)
)


[User] Get the five most recent public posts that have media_type = 'video', showing post_id, created_at, and the author's username.

[Assistant]
SELECT
  p.post_id,
  p.created_at,
  u.username
FROM social_media.posts p
JOIN social_media.users u
  ON p.user_id = u.user_id
WHERE p.visibility = 'public'
  AND p.media_type = 'video'
ORDER BY p.created_at DESC
LIMIT 5;

[User] Actually, filter to only include posts made by verified users.

[Assistant]
SELECT
  p.post_id,
  p.created_at,
  u.username
FROM social_media.posts p
JOIN social_media.users u
  ON p.user_id = u.user_id
WHERE p.visibility = 'public'
  AND p.media_type = 'video'
  AND u.is_verified = TRUE
ORDER BY p.created_at DESC
LIMIT 5;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE social_media.users ( user_id.text, username.text, email.text, password_hash.text, full_name.text, profile_picture_url.text, bio.text, location.text, created_at.timestamp, updated_at.timestamp, is_verified.boolean )
CREATE TABLE social_media.posts ( post_id.text, user_id.text, content.text, media_url.text, media_type.text, created_at.timestamp, updated_at.timestamp, visibility.text, location_lat.numeric, location_lon.numeric )
CREATE TABLE social_media.comments ( comment_id.text, post_id.text, user_id.text, parent_comment_id.text, content.text, created_at.timestamp, updated_at.timestamp )
CREATE TABLE social_media.likes ( like_id.text, user_id.text, post_id.text, comment_id.text, created_at.timestamp )
CREATE TABLE social_media.follows ( follow_id.text, follower_user_id.text, following_user_id.text, created_at.timestamp )
CREATE TABLE social_media.hashtags ( hashtag_id.text, tag_name.text, created_at.timestamp )
CREATE TABLE social_media.post_hashtags ( post_hashtag_id.text, post_id.text, hashtag_id.text )
CREATE TABLE social_media.messages ( message_id.text, conversation_id.text, sender_user_id.text, content.text, media_url.text, media_type.text, sent_at.timestamp, read_at.timestamp )
CREATE TABLE social_media.conversations ( conversation_id.text, created_at.timestamp, last_message_at.timestamp, is_group_chat.boolean, group_name.text )
CREATE TABLE social_media.conversation_participants ( participant_id.text, conversation_id.text, user_id.text, joined_at.timestamp, last_read_at.timestamp )
CREATE TABLE social_media.user_settings ( setting_id.text, user_id.text, theme.text, email_notifications_enabled.boolean, push_notifications_enabled.boolean, private_profile.boolean, updated_at.timestamp )


[User] Show me the average high price and average low price for each security sector using market data.

[Assistant] SELECT T1.sector, AVG(T2.high_price) AS average_high_price, AVG(T2.low_price) AS average_low_price FROM financial_services.securities AS T1 JOIN financial_services.market_data AS T2 ON T1.security_id = T2.security_id WHERE T1.sector IS NOT NULL GROUP BY T1.sector

[User] Restrict the data to market data points from 2023.

[Assistant] SELECT T1.sector, AVG(T2.high_price) AS average_high_price, AVG(T2.low_price) AS average_low_price FROM financial_services.securities AS T1 JOIN financial_services.market_data AS T2 ON T1.security_id = T2.security_id WHERE T1.sector IS NOT NULL AND EXTRACT(YEAR FROM T2.data_timestamp) = 2023 GROUP BY T1.sector

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE financial_services.customers ( customer_id text, first_name text, last_name text, date_of_birth date, ssn_hash text, address text, city text, state text, zip_code text, country text, email text, phone_number text, created_at timestamp, status text, risk_profile text )
CREATE TABLE financial_services.accounts ( account_id.text, customer_id.text, account_number.text, account_type.text, balance.numeric, currency.text, opened_date.date, status.text, interest_rate.numeric, last_updated_at.timestamp )
CREATE TABLE financial_services.transactions ( transaction_id text, account_id text, related_account_id text, transaction_type text, amount numeric, currency text, transaction_date timestamp, effective_date date, description text, status text, reference_number text )
CREATE TABLE financial_services.securities ( security_id.text, ticker_symbol.text, isin_code.text, cusip_code.text, security_name.text, security_type.text, exchange.text, currency.text, issuer_name.text, sector.text, last_updated.timestamp )
CREATE TABLE financial_services.trades ( trade_id character varying(64) NOT NULL, account_id character varying(64) NOT NULL, security_id character varying(64) NOT NULL, order_id character varying(64), trade_type character varying(10) NOT NULL, quantity numeric(19, 8) NOT NULL, price_per_unit numeric(19, 8) NOT NULL, total_amount numeric(19, 4) NOT NULL, commission numeric(10, 4), trade_timestamp timestamp NOT NULL, settlement_date date, status character varying(32) NOT NULL, execution_venue character varying(100), PRIMARY KEY (trade_id), FOREIGN KEY (account_id) REFERENCES financial_services.accounts(account_id), FOREIGN KEY (security_id) REFERENCES financial_services.securities(security_id) )
CREATE TABLE financial_services.market_data ( data_point_id bigserial NOT NULL, security_id character varying(64) NOT NULL, data_timestamp timestamp NOT NULL, open_price numeric(19, 8), high_price numeric(19, 8), low_price numeric(19, 8), close_price numeric(19, 8) NOT NULL, adjusted_close_price numeric(19, 8), volume bigint, source character varying(50), PRIMARY KEY (data_point_id), UNIQUE (security_id, data_timestamp), FOREIGN KEY (security_id) REFERENCES financial_services.securities(security_id) )
CREATE TABLE financial_services.loans ( loan_id text, account_id text, loan_type text, principal_amount numeric, current_principal_balance numeric, interest_rate numeric, term_months integer, origination_date date, maturity_date date, monthly_payment numeric, collateral_description text, status text )


[User] Show the first name, last name, and email of customers who have filed a claim, along with the status and estimated loss of each claim.

[Assistant] SELECT T1.first_name, T1.last_name, T1.email, T2.status, T2.estimated_loss FROM insurance.customers AS T1 INNER JOIN insurance.claims AS T2 ON T1.customer_id = T2.customer_id;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE insurance.customers ( customer_id text, first_name text, last_name text, date_of_birth date, ssn_hash text, address_line1 text, address_line2 text, city text, state text, zip_code text, country text, phone_number text, email text, created_at timestamp, updated_at timestamp, status text )
CREATE TABLE insurance.claims ( claim_id character varying(64) NOT NULL, policy_id character varying(64) NOT NULL, customer_id character varying(64) NOT NULL, incident_date timestamp NOT NULL, reported_date timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, description text NOT NULL, estimated_loss numeric(15, 2), status character varying(30) NOT NULL, settlement_amount numeric(15, 2), settlement_date date, claim_handler_id character varying(64), police_report_number character varying(100), PRIMARY KEY (claim_id) )
CREATE TABLE insurance.insurance_products ( product_id.text, product_name.text, product_type.text, description.text, base_premium.numeric, coverage_details.text, underwriting_rules.text, is_active.boolean, created_at.timestamp, updated_at.timestamp )
CREATE TABLE insurance.agents ( agent_id.text, first_name.text, last_name.text, agency_name.text, license_number.text, license_state.text, contact_email.text, contact_phone.text, hire_date.date, termination_date.date, status.text, commission_rate.numeric, manager_id.text )
CREATE TABLE insurance.premium_payments ( payment_id character varying(64) NOT NULL, policy_id character varying(64) NOT NULL, customer_id character varying(64) NOT NULL, payment_date timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, amount_paid numeric(12, 2) NOT NULL, payment_method character varying(50), transaction_reference character varying(128) UNIQUE, due_date date, payment_period_start date, payment_period_end date, status character varying(30) NOT NULL DEFAULT 'Completed', PRIMARY KEY (payment_id) )
CREATE TABLE insurance.claim_documents ( document_id.text, claim_id.text, document_type.text, file_name.text, file_path.text, file_size_bytes.integer, mime_type.text, uploaded_by.text, uploaded_at.timestamp, description.text )


[User] For each user, show their user ID and the count of unique wallet addresses they own.

[Assistant] SELECT user_id, COUNT(DISTINCT address) FROM wallets GROUP BY user_id;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE trading_platform.wallets ( wallet_id.text, user_id.text, address.text, private_key.text, created_at.timestamp )


[User] Show me all active loans (loan_id, loan_type, principal_amount) where the remaining term is less than 12 months, along with the account_id and monthly_payment.

[Assistant] SELECT loan_id, loan_type, principal_amount, account_id, monthly_payment FROM financial_services.loans WHERE status = 'Active' AND maturity_date BETWEEN CURRENT_DATE AND (CURRENT_DATE + INTERVAL '12 months')

[User] Now modify the query to only include home loans (loan_type = 'Home') and sort them by remaining term in ascending order.

[Assistant] SELECT loan_id, loan_type, principal_amount, account_id, monthly_payment FROM financial_services.loans WHERE status = 'Active' AND loan_type = 'Home' AND maturity_date BETWEEN CURRENT_DATE AND (CURRENT_DATE + INTERVAL '12 months') ORDER BY (maturity_date - CURRENT_DATE) ASC

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE financial_services.loans ( loan_id character varying(64) NOT NULL, account_id character varying(64) NOT NULL UNIQUE, loan_type character varying(50) NOT NULL, principal_amount numeric(19, 4) NOT NULL, current_principal_balance numeric(19, 4) NOT NULL, interest_rate numeric(6, 4) NOT NULL, term_months integer NOT NULL, origination_date date NOT NULL, maturity_date date NOT NULL, monthly_payment numeric(12, 4), collateral_description text, status character varying(32) NOT NULL, PRIMARY KEY (loan_id), FOREIGN KEY (account_id) REFERENCES financial_services.accounts(account_id) )


[User] List the transaction IDs which have had more than one unique event emitted inside them.

[Assistant] SELECT transaction_id FROM web3.events GROUP BY transaction_id HAVING COUNT(DISTINCT event_name) > 1;

[User] Actually, can you also list the names of these unique events for each transaction ID?

[Assistant] SELECT transaction_id, STRING_AGG(DISTINCT event_name, ', ') AS unique_event_names FROM web3.events GROUP BY transaction_id HAVING COUNT(DISTINCT event_name) > 1;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE web3.events ( event_id character varying(64) NOT NULL, contract_id character varying(64) NOT NULL, event_name character varying(128) NOT NULL, data text NOT NULL, emitted_at timestamp NOT NULL, transaction_id character varying(64) NOT NULL, log_index integer NOT NULL, PRIMARY KEY (event_id) )


[User] List the names of services and the total number of times each service has been ordered. Only include services that have been ordered at least once.

[Assistant] SELECT T1.service_name, count(T2.order_id) AS order_count FROM hospitality_technology.services AS T1 JOIN hospitality_technology.service_orders AS T2 ON T1.service_id = T2.service_id GROUP BY T1.service_name;

[User] Now, filter this list to only show services from the 'Food & Beverage' or 'Activities' categories, and sort by the order count in descending order.

[Assistant] SELECT T1.service_name, count(T2.order_id) AS order_count FROM hospitality_technology.services AS T1 JOIN hospitality_technology.service_orders AS T2 ON T1.service_id = T2.service_id WHERE T1.category IN ('Food & Beverage', 'Activities') GROUP BY T1.service_name ORDER BY order_count DESC;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE hospitality_technology.properties ( property_id character varying(64) NOT NULL, property_name character varying(255) NOT NULL, address_line1 character varying(255) NOT NULL, address_line2 character varying(255), city character varying(100) NOT NULL, state_province character varying(100), postal_code character varying(20) NOT NULL, country_code character varying(3) NOT NULL, phone_number character varying(30), email_address character varying(255), property_type character varying(50) NOT NULL, star_rating numeric(2,1), timezone character varying(64) NOT NULL, manager_staff_id character varying(64), created_at timestamp with time zone NOT NULL DEFAULT current_timestamp, updated_at timestamp with time zone NOT NULL DEFAULT current_timestamp, PRIMARY KEY (property_id) )
CREATE TABLE hospitality_technology.rooms ( room_id character varying(64) NOT NULL, property_id character varying(64) NOT NULL, room_number character varying(10) NOT NULL, room_type_id character varying(64) NOT NULL, floor integer, status character varying(50) NOT NULL, is_smoking boolean NOT NULL DEFAULT false, features text, current_condition text, last_cleaned_at timestamp with time zone, PRIMARY KEY (room_id), FOREIGN KEY (property_id) REFERENCES hospitality_technology.properties(property_id), FOREIGN KEY (room_type_id) REFERENCES hospitality_technology.room_types(room_type_id) )
CREATE TABLE hospitality_technology.room_types ( room_type_id character varying(64) NOT NULL, property_id character varying(64) NOT NULL, type_name character varying(100) NOT NULL, description text, base_rate numeric(10, 2) NOT NULL, max_occupancy integer NOT NULL, bed_type character varying(50), area_sqft numeric(8,2), amenities text, PRIMARY KEY (room_type_id), FOREIGN KEY (property_id) REFERENCES hospitality_technology.properties(property_id) )
CREATE TABLE hospitality_technology.guests ( guest_id character varying(64) NOT NULL, first_name character varying(100) NOT NULL, last_name character varying(100) NOT NULL, email character varying(255) UNIQUE, phone_number character varying(30), date_of_birth date, address_line1 character varying(255), city character varying(100), state_province character varying(100), postal_code character varying(20), country_code character varying(3), preferences text, loyalty_member_id character varying(64) UNIQUE, communication_consent boolean DEFAULT true, created_at timestamp with time zone NOT NULL DEFAULT current_timestamp, updated_at timestamp with time zone NOT NULL DEFAULT current_timestamp, PRIMARY KEY (guest_id) )
CREATE TABLE hospitality_technology.reservations ( reservation_id character varying(64) NOT NULL, property_id character varying(64) NOT NULL, guest_id character varying(64) NOT NULL, room_id character varying(64), room_type_id character varying(64) NOT NULL, check_in_date date NOT NULL, check_out_date date NOT NULL, actual_check_in_ts timestamp with time zone, actual_check_out_ts timestamp with time zone, num_adults integer NOT NULL, num_children integer DEFAULT 0, status character varying(50) NOT NULL, booking_source character varying(100), rate_plan_id character varying(64), total_amount numeric(12, 2), amount_paid numeric(12, 2) DEFAULT 0.00, special_requests text, created_at timestamp with time zone NOT NULL DEFAULT current_timestamp, updated_at timestamp with time zone NOT NULL DEFAULT current_timestamp, PRIMARY KEY (reservation_id), FOREIGN KEY (property_id) REFERENCES hospitality_technology.properties(property_id), FOREIGN KEY (guest_id) REFERENCES hospitality_technology.guests(guest_id), FOREIGN KEY (room_id) REFERENCES hospitality_technology.rooms(room_id), FOREIGN KEY (room_type_id) REFERENCES hospitality_technology.room_types(room_type_id) )
CREATE TABLE hospitality_technology.services ( service_id character varying(64) NOT NULL, property_id character varying(64) NOT NULL, service_name character varying(150) NOT NULL, description text, category character varying(100), price numeric(10, 2) NOT NULL, unit character varying(30), is_available boolean NOT NULL DEFAULT true, department character varying(100), PRIMARY KEY (service_id), FOREIGN KEY (property_id) REFERENCES hospitality_technology.properties(property_id) )
CREATE TABLE hospitality_technology.service_orders ( order_id character varying(64) NOT NULL, reservation_id character varying(64), guest_id character varying(64) NOT NULL, service_id character varying(64) NOT NULL, staff_id_ordered character varying(64), staff_id_delivered character varying(64), order_timestamp timestamp with time zone NOT NULL DEFAULT current_timestamp, delivery_timestamp timestamp with time zone, quantity integer NOT NULL DEFAULT 1, unit_price numeric(10, 2) NOT NULL, total_price numeric(12, 2) NOT NULL, status character varying(50) NOT NULL, notes text, bill_id character varying(64), PRIMARY KEY (order_id), FOREIGN KEY (reservation_id) REFERENCES hospitality_technology.reservations(reservation_id), FOREIGN KEY (guest_id) REFERENCES hospitality_technology.guests(guest_id), FOREIGN KEY (service_id) REFERENCES hospitality_technology.services(service_id), FOREIGN KEY (staff_id_ordered) REFERENCES hospitality_technology.staff(staff_id), FOREIGN KEY (staff_id_delivered) REFERENCES hospitality_technology.staff(staff_id) )
CREATE TABLE hospitality_technology.payments ( payment_id character varying(64) NOT NULL, reservation_id character varying(64), guest_id character varying(64) NOT NULL, bill_id character varying(64), amount numeric(12,2) NOT NULL, currency_code character varying(3) NOT NULL, payment_method character varying(50) NOT NULL, card_type character varying(50), card_last_four character varying(4), transaction_ref character varying(128), payment_timestamp timestamp with time zone NOT NULL DEFAULT current_timestamp, status character varying(50) NOT NULL, staff_id_processed character varying(64), notes text, PRIMARY KEY (payment_id), FOREIGN KEY (reservation_id) REFERENCES hospitality_technology.reservations(reservation_id), FOREIGN KEY (guest_id) REFERENCES hospitality_technology.guests(guest_id), FOREIGN KEY (staff_id_processed) REFERENCES hospitality_technology.staff(staff_id) )
CREATE TABLE hospitality_technology.reviews ( review_id character varying(64) NOT NULL, property_id character varying(64) NOT NULL, reservation_id character varying(64) UNIQUE, guest_id character varying(64) NOT NULL, rating_overall integer, rating_cleanliness integer, rating_service integer, rating_location integer, rating_value integer, comment text, review_source character varying(100), review_date timestamp with time zone NOT NULL DEFAULT current_timestamp, is_public boolean DEFAULT true, staff_response text, response_staff_id character varying(64), response_date timestamp with time zone, PRIMARY KEY (review_id), FOREIGN KEY (property_id) REFERENCES hospitality_technology.properties(property_id), FOREIGN KEY (reservation_id) REFERENCES hospitality_technology.reservations(reservation_id), FOREIGN KEY (guest_id) REFERENCES hospitality_technology.guests(guest_id), FOREIGN KEY (response_staff_id) REFERENCES hospitality_technology.staff(staff_id) )


[User] What is the ticket price for a journey on train number T4321?

[Assistant] I'm sorry, but I don't have access to information about ticket prices for specific trains. The data I have is limited to train details such as model, manufacturer, capacity, and maintenance schedules. For ticket pricing, please consult the ticketing office or the official website.

System:
You are an SQL statement expert and you can refuse the user's question if the question is not related to the table structure. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE train_station_management.trains ( train_id text PRIMARY KEY, train_number text UNIQUE, model text, manufacturer text, year_manufactured int, capacity int, status text, last_maintenance_date date, next_maintenance_date date )


[User] Provide a count of notifications, separated by whether they have been read or not.

[Assistant] SELECT CASE WHEN T1.read_at IS NULL THEN 'Unread' ELSE 'Read' END, count(T1.notification_id) FROM trading_platform.notifications AS T1 GROUP BY CASE WHEN T1.read_at IS NULL THEN 'Unread' ELSE 'Read' END

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE trading_platform.notifications ( notification_id.text, user_id.text, message.text, sent_at.timestamp, read_at.timestamp )


[User] Count the number of appointments that have a status of 'Cancelled'.

[Assistant] SELECT COUNT(*) FROM government_services.appointments WHERE status = 'Cancelled';

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE government_services.appointments ( appointment_id text, citizen_id text, employee_id text, location_id text, service_id text, scheduled_start_time timestamp, scheduled_end_time timestamp, purpose text, status text, booking_method text, created_at timestamp, notes text )


[User] List the usernames and user IDs of all users whose bio contains the word 'developer'.

[Assistant]
SELECT user_id, username
FROM social_media.users
WHERE bio ILIKE '%developer%';

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE social_media.users (
    user_id character varying(64) NOT NULL,  -- unique identifier for the user
    username character varying(50) NOT NULL UNIQUE, -- user's unique handle
    email character varying(128) NOT NULL UNIQUE, -- user's email address
    password_hash text NOT NULL, -- hashed password
    full_name character varying(100), -- user's full name
    profile_picture_url text, -- URL to the profile picture
    bio text, -- short user biography
    location character varying(100), -- user's location
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- timestamp of account creation
    updated_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- timestamp of last profile update
    is_verified boolean NOT NULL DEFAULT false, -- verification status
    PRIMARY KEY (user_id)
)
CREATE TABLE social_media.comments (
    comment_id character varying(64) NOT NULL, -- unique identifier for the comment
    post_id character varying(64) NOT NULL, -- identifier of the post being commented on (FK to posts.post_id)
    user_id character varying(64) NOT NULL, -- identifier of the user who made the comment (FK to users.user_id)
    parent_comment_id character varying(64), -- identifier of the parent comment if it's a reply (FK to comments.comment_id)
    content text NOT NULL, -- textual content of the comment
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- timestamp of comment creation
    updated_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- timestamp of last comment edit
    PRIMARY KEY (comment_id)
)
CREATE TABLE social_media.likes (
    like_id character varying(64) NOT NULL, -- unique identifier for the like
    user_id character varying(64) NOT NULL, -- identifier of the user who liked (FK to users.user_id)
    post_id character varying(64), -- identifier of the post being liked (FK to posts.post_id, nullable)
    comment_id character varying(64), -- identifier of the comment being liked (FK to comments.comment_id, nullable)
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- timestamp of when the like occurred
    PRIMARY KEY (like_id),
    CONSTRAINT unique_user_like UNIQUE (user_id, post_id, comment_id), -- prevent duplicate likes
    CONSTRAINT check_like_target CHECK (post_id IS NOT NULL OR comment_id IS NOT NULL) -- ensure it likes something
)
CREATE TABLE social_media.follows (
    follow_id character varying(64) NOT NULL, -- unique identifier for the follow relationship
    follower_user_id character varying(64) NOT NULL, -- identifier of the user who is following (FK to users.user_id)
    following_user_id character varying(64) NOT NULL, -- identifier of the user being followed (FK to users.user_id)
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- timestamp of when the follow started
    PRIMARY KEY (follow_id),
    CONSTRAINT unique_follow UNIQUE (follower_user_id, following_user_id) -- prevent duplicate follows
)
CREATE TABLE social_media.hashtags (
    hashtag_id character varying(64) NOT NULL, -- unique identifier for the hashtag
    tag_name character varying(100) NOT NULL UNIQUE, -- the actual hashtag text (without '#')
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- timestamp when the hashtag was first used
    PRIMARY KEY (hashtag_id)
)
CREATE TABLE social_media.conversations (
    conversation_id character varying(64) NOT NULL, -- unique identifier for the conversation
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- timestamp when conversation was initiated
    last_message_at timestamp, -- timestamp of the last message in the conversation
    is_group_chat boolean NOT NULL DEFAULT false, -- indicates if it's a group chat or direct message
    group_name character varying(100), -- name of the group chat (if applicable)
    PRIMARY KEY (conversation_id)
)
CREATE TABLE social_media.conversation_participants (
    participant_id character varying(64) NOT NULL, -- unique identifier for the participant entry
    conversation_id character varying(64) NOT NULL, -- identifier of the conversation (FK to conversations.conversation_id)
    user_id character varying(64) NOT NULL, -- identifier of the user in the conversation (FK to users.user_id)
    joined_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- timestamp when user joined the conversation
    last_read_at timestamp, -- timestamp indicating up to when the user has read messages
    PRIMARY KEY (participant_id),
    CONSTRAINT unique_user_conversation UNIQUE (conversation_id, user_id) -- prevent user being added multiple times
)
CREATE TABLE social_media.notifications (
    notification_id character varying(64) NOT NULL, -- unique identifier for the notification
    recipient_user_id character varying(64) NOT NULL, -- user receiving the notification (FK to users.user_id)
    sender_user_id character varying(64), -- user triggering the notification (FK to users.user_id, can be null for system notifications)
    notification_type character varying(30) NOT NULL, -- type of notification ('like', 'comment', 'follow', 'mention', 'message')
    target_entity_id character varying(64), -- ID of the related entity (post_id, comment_id, user_id, conversation_id)
    target_entity_type character varying(20), -- type of the related entity ('post', 'comment', 'user', 'conversation')
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- timestamp notification was created
    read_at timestamp, -- timestamp notification was marked as read
    PRIMARY KEY (notification_id)
)
CREATE TABLE social_media.user_settings (
    setting_id character varying(64) NOT NULL, -- unique identifier for the setting entry
    user_id character varying(64) NOT NULL UNIQUE, -- user the settings belong to (FK to users.user_id)
    theme character varying(20) DEFAULT 'light', -- UI theme ('light', 'dark')
    email_notifications_enabled boolean DEFAULT true, -- enable/disable email notifications
    push_notifications_enabled boolean DEFAULT true, -- enable/disable push notifications
    private_profile boolean DEFAULT false, -- is the user profile private
    updated_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- timestamp of last setting change
    PRIMARY KEY (setting_id)
)


[User] List all Sui NFT collections where the owner is not null, including their name and collection_type.

[Assistant] SELECT name, collection_type FROM sui_nfts WHERE owner IS NOT NULL;

[User] Can you also include the display field and filter to only show collections with a package_id starting with '0x'?

[Assistant] SELECT name, collection_type, display FROM sui_nfts WHERE owner IS NOT NULL AND package_id LIKE '0x%';

[User] Now sort these results by name in ascending order and limit to 10.

[Assistant] SELECT name, collection_type, display FROM sui_nfts WHERE owner IS NOT NULL AND package_id LIKE '0x%' ORDER BY name ASC LIMIT 10;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE token_metas ( block_timestamp timestamp(6) NOT NULL, block_number bigint NOT NULL, transaction_hash varchar NOT NULL, transaction_index bigint NOT NULL, from_address varchar NOT NULL, contract_address varchar NOT NULL, symbol varchar NOT NULL, total_supply varchar NOT NULL, name varchar NOT NULL, decimals bigint NOT NULL, is_erc20 integer NOT NULL, is_erc721 integer NOT NULL, is_erc1155 integer NOT NULL, is_proxy integer NOT NULL, extra_info varchar NOT NULL, pk integer NOT NULL )
CREATE TABLE erc20_balances ( block_number bigint, contract_address varchar, wallet_address varchar, amount varchar, pk varchar )
CREATE TABLE nft_holder_historical ( block_number.bigint, contract_address.text, wallet_address.text, token_id.text, contract_type.text, amount.text, pk.integer )
CREATE TABLE sui_coins_metadata ( object_id varchar NOT NULL, coin_type varchar NOT NULL, status varchar NOT NULL, decimals bigint NOT NULL, description varchar NOT NULL, icon_url varchar NOT NULL, symbol varchar NOT NULL, name varchar NOT NULL )
CREATE TABLE sui_nfts ( object_id text, status text, collection_type text, package_id text, previous_transaction text, display text, owner text, name text )
CREATE TABLE nft_collections ( blockchain.text, contract_address.text, name.text, symbol.text, deploy_block_number.bigint, deploy_block_time.bigint, erc_type.text, owner.text, traits.text, description.text, slug.text, media_info.text, image_url.text, banner_image_url.text, updated_at.bigint, banner.text, token_count.bigint, floor_price.text, floor_price_symbol.text, floor_price_contract.text, pk.integer )
CREATE TABLE token_prices_latest (
    blockchain varchar(36) NOT NULL, -- blockchain fields for the functionType  in contract
    address varchar(42) NOT NULL, -- address fields for the functionType  in contract
    decimals bigint NOT NULL, -- decimals fields for the functionType  in contract
    symbol varchar(36) NOT NULL, -- symbol fields for the functionType  in contract
    price real NOT NULL, -- price fields for the functionType  in contract
    timestamp timestamp(6) NOT NULL  -- timestamp fields for the functionType  in contract
)
CREATE TABLE token_balances ( block_number bigint, block_timestamp timestamp, tick varchar, wallet_address varchar, total_supply decimal, amount decimal )
CREATE TABLE token_activities ( block_timestamp.timestamp, block_number.bigint, tx_index.integer, tx_hash.text, log_index.integer, type.text, tick.text, id.text, amt.decimal, from_address.text, to_address.text )
CREATE TABLE token_balances_bitcoin (
    block_number bigint NOT NULL, -- Block number containing the transaction
    block_timestamp timestamp(3) NOT NULL, -- Block timestamp containing the transaction
    tick varchar(255) NOT NULL, -- Ticker: Identifier of the inscription
    wallet_address varchar(42) NOT NULL, -- Address of owner
    total_supply varchar NOT NULL, -- Max supply: Set max supply of the inscription
    amount varchar NOT NULL  -- The balance of wallet balance at the corresponding block height
)
CREATE TABLE token_info_bitcoin (
    block_timestamp timestamp(3) NOT NULL, -- Timestamp of the block containing the inscription (matches block_timestamp in transactions table)
    block_number bigint NOT NULL, -- Block number containing the inscription (matches block_number in transactions table)
    tx_index integer NOT NULL, -- Index of the transaction containing the inscription (matches transaction_index in transactions table)
    tx_hash varchar(66) NOT NULL, -- Unique identifier of the transaction containing the inscription (matches hash in transactions table)
    tick varchar(255) NOT NULL, -- Ticker:  Identifier of the inscription
    max_supply decimal(38,0) NOT NULL, -- Max supply: Set max supply of the inscription
    lim decimal(38,0) NOT NULL, -- Mint limit: limit per inscription
    wlim decimal(38,0) NOT NULL, -- Limit of each address can maximum mint
    dec integer NOT NULL, -- Decimal for minimum divie
    creator varchar(42) NOT NULL  -- Address originating the inscription (matches from_address in transactions table)
)
CREATE TABLE token_activities_bitcoin (
    block_timestamp timestamp(3) NOT NULL, -- Timestamp of the block containing the inscription (matches block_timestamp in transactions table)
    block_number bigint NOT NULL, -- Block number containing the inscription (matches block_number in transactions table)
    tx_index integer NOT NULL, -- Index of the transaction containing the inscription (matches transaction_index in transactions table)
    tx_hash varchar(66) NOT NULL, -- Unique identifier of the transaction containing the inscription (matches hash in transactions table)
    log_index integer NOT NULL, -- Index of the log within the transaction
    type varchar(20) NOT NULL, -- Operation: Type of event (deploy, mint, transfer, list)
    tick varchar(255) NOT NULL, -- Ticker: Identifier of the inscription
    id varchar(255) NOT NULL, -- Unique identifier of the inscription
    amt decimal(38,0) NOT NULL, -- Amount to mint: States the amount of the inscription to operation. When operation is mint, has to be less or equal to "lim"
    from_address varchar(62) NOT NULL, -- Address sending the inscription
    to_address varchar(62) NOT NULL  -- Address receiving the inscription
)
CREATE TABLE token_balances_avalanche (
    block_number bigint NOT NULL, -- Block number containing the transaction
    block_timestamp timestamp(3) NOT NULL, -- Block timestamp containing the transaction
    tick varchar(20) NOT NULL, -- Ticker: Identifier of the inscription
    wallet_address varchar(42) NOT NULL, -- Address of owner
    total_supply decimal(38,0) NOT NULL, -- Max supply: Set max supply of the inscription
    amount decimal(38,0) NOT NULL  -- The balance of wallet balance at the corresponding block height
)
CREATE TABLE token_info_avalanche ( block_timestamp timestamp(3) NOT NULL, block_number bigint NOT NULL, tx_index integer NOT NULL, tx_hash varchar(66) NOT NULL, tick varchar(20) NOT NULL, max_supply decimal(38,0) NOT NULL, lim decimal(38,0) NOT NULL, wlim decimal(38,0) NOT NULL, dec integer NOT NULL, creator varchar(42) NOT NULL, minted decimal(38,0) NOT NULL, holders decimal(38,0) NOT NULL, txs decimal(38,0) NOT NULL, updated_timestamp timestamp(3) NOT NULL, completed_timestamp timestamp(3) NOT NULL, id varchar(255) NOT NULL )


[User] Find currently employed employees whose direct manager has been terminated. Display the employee's full name, hire date, manager's full name, and manager's termination date.

[Assistant]
SELECT e.employee_id,
       CONCAT(e.first_name, ' ', e.last_name) AS employee_full_name,
       e.hire_date,
       CONCAT(m.first_name, ' ', m.last_name) AS manager_full_name,
       m.termination_date
FROM government_services.employees e
JOIN government_services.employees m ON e.manager_employee_id = m.employee_id
WHERE e.termination_date IS NULL
  AND m.termination_date IS NOT NULL;

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE government_services.citizens ( citizen_id text, national_id_number text, first_name text, last_name text, date_of_birth date, gender text, primary_address text, contact_email text, contact_phone text, registration_date timestamp, is_verified boolean )
CREATE TABLE government_services.agencies ( agency_id character varying(64) NOT NULL, agency_name character varying(255) NOT NULL, jurisdiction_level character varying(50) NOT NULL, primary_contact_email character varying(128), main_phone_number character varying(32), website_url character varying(255), established_date date, parent_agency_id character varying(64), PRIMARY KEY (agency_id) )
CREATE TABLE government_services.payments ( payment_id text PRIMARY KEY, application_id text, citizen_id text, service_id text, amount numeric, currency text, payment_method text, payment_provider_reference text, payment_timestamp timestamp, status text, notes text )
CREATE TABLE government_services.employees (
    employee_id character varying(64) NOT NULL, -- unique identifier for the government employee
    agency_id character varying(64) NOT NULL, -- FK to agencies table
    first_name character varying(100) NOT NULL,
    last_name character varying(100) NOT NULL,
    job_title character varying(150) NOT NULL,
    department character varying(100),
    work_email character varying(128) NOT NULL UNIQUE,
    work_phone character varying(32),
    hire_date date NOT NULL,
    termination_date date, -- null if currently employed
    access_level character varying(50), -- Role or permission level
    manager_employee_id character varying(64), -- FK to self for reporting structure
    PRIMARY KEY (employee_id)
)
CREATE TABLE government_services.service_locations ( location_id text PRIMARY KEY, agency_id text, location_name text, address text, city text, state text, postal_code text, latitude numeric, longitude numeric, operating_hours text, contact_phone text, is_accessible boolean )
CREATE TABLE government_services.appointments ( appointment_id character varying(64) NOT NULL, citizen_id character varying(64) NOT NULL, employee_id character varying(64), location_id character varying(64), service_id character varying(64), scheduled_start_time timestamp NOT NULL, scheduled_end_time timestamp, purpose text NOT NULL, status character varying(30) NOT NULL, booking_method character varying(50), created_at timestamp NOT NULL, notes text, PRIMARY KEY (appointment_id) )
CREATE TABLE government_services.notifications ( notification_id character varying(64) NOT NULL, citizen_id character varying(64) NOT NULL, application_id character varying(64), message_subject character varying(255), message_body text NOT NULL, channel character varying(30) NOT NULL, sent_at timestamp NOT NULL, status character varying(30) NOT NULL, related_entity_type character varying(50), related_entity_id character varying(64), PRIMARY KEY (notification_id) )


[User] What are the fuel consumption rates per hour for the Boeing 747-8 model?

[Assistant] I'm sorry, but I can't provide information on the fuel consumption rates for the Boeing 747-8 model as this data is not included in the aircraft_models table. The table contains details such as model name, manufacturer, passenger capacity, and other specifications, but fuel consumption data is not available. If you have another question or need assistance with something else related to the table, I'm happy to help.

System:
You are an SQL statement expert and you can refuse the user's question if the question is not related to the table structure. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE manufacturing.aircraft_models ( model_id.text, model_name.text, manufacturer.text, passenger_capacity.integer, max_range_km.integer, engine_type.text, wingspan_m.numeric, status.text, first_flight_date.date )


[User] Show me all documents uploaded by lawyers from the 'Smith Legal Group' firm, including document_name, upload_timestamp, and the lawyer's first and last name.

[Assistant]
SELECT d.document_name, d.upload_timestamp, l.first_name, l.last_name
FROM legal_services.documents d
JOIN legal_services.lawyers l ON d.uploaded_by_lawyer_id = l.lawyer_id
JOIN legal_services.law_firms f ON l.firm_id = f.firm_id
WHERE f.firm_name = 'Smith Legal Group';

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE legal_services.clients (
    client_id character varying(64) NOT NULL,  -- unique identifier for the client
    first_name character varying(100) NOT NULL, -- client's first name
    last_name character varying(100) NOT NULL, -- client's last name
    company_name character varying(200), -- company name if applicable
    email character varying(128) UNIQUE NOT NULL, -- client's primary email
    phone character varying(32), -- client's contact phone number
    address text, -- client's full address
    date_registered timestamp NOT NULL, -- when the client was first registered
    status character varying(32) NOT NULL, -- client status (e.g., active, inactive, prospect)
    PRIMARY KEY (client_id)
)
CREATE TABLE legal_services.lawyers (
    lawyer_id character varying(64) NOT NULL,  -- unique identifier for the lawyer
    first_name character varying(100) NOT NULL, -- lawyer's first name
    last_name character varying(100) NOT NULL, -- lawyer's last name
    bar_number character varying(64) UNIQUE NOT NULL, -- lawyer's bar association number
    firm_id character varying(64), -- FK to law_firms table
    email character varying(128) UNIQUE NOT NULL, -- lawyer's professional email
    phone character varying(32), -- lawyer's contact phone number
    specialization text, -- areas of legal expertise
    hire_date timestamp NOT NULL, -- date the lawyer was hired or joined
    is_partner boolean DEFAULT false, -- flag indicating if the lawyer is a partner
    PRIMARY KEY (lawyer_id)
)
CREATE TABLE legal_services.cases (
    case_id character varying(64) NOT NULL,  -- unique identifier for the case/matter
    case_number character varying(100) UNIQUE, -- official case number (court or internal)
    case_name text NOT NULL, -- descriptive name or title for the case
    client_id character varying(64) NOT NULL, -- FK to clients table
    lead_lawyer_id character varying(64) NOT NULL, -- FK to lawyers table (primary lawyer responsible)
    case_type character varying(100) NOT NULL, -- e.g., Litigation, Corporate, Family Law, IP
    status character varying(50) NOT NULL, -- e.g., Open, Closed, Pending, On Hold, Appealed
    date_opened timestamp NOT NULL, -- date the case was formally opened
    date_closed timestamp, -- date the case was closed (nullable)
    description text, -- detailed description of the case
    court_jurisdiction character varying(128), -- court or jurisdiction if applicable
    PRIMARY KEY (case_id)
)
CREATE TABLE legal_services.documents (
    document_id character varying(64) NOT NULL,  -- unique identifier for the document
    case_id character varying(64) NOT NULL, -- FK to cases table
    document_name character varying(255) NOT NULL, -- name of the document file
    document_type character varying(100), -- e.g., Pleading, Contract, Evidence, Correspondence
    storage_path text NOT NULL, -- path or reference to the document storage location
    uploaded_by_lawyer_id character varying(64), -- FK to lawyers table (who uploaded it)
    upload_timestamp timestamp NOT NULL, -- time the document was uploaded
    version integer DEFAULT 1, -- document version number
    description text, -- brief description or notes about the document
    PRIMARY KEY (document_id)
)
CREATE TABLE legal_services.time_entries (
    entry_id character varying(64) NOT NULL,  -- unique identifier for the time entry
    case_id character varying(64) NOT NULL, -- FK to cases table
    lawyer_id character varying(64) NOT NULL, -- FK to lawyers table (who performed the work)
    date_worked date NOT NULL, -- date the work was performed
    hours_spent numeric(5, 2) NOT NULL CHECK (hours_spent > 0), -- duration of work in hours (e.g., 1.5 for 1h 30m)
    billing_rate numeric(10, 2) NOT NULL, -- hourly rate applied for this entry
    description text NOT NULL, -- detailed description of the work performed
    is_billable boolean DEFAULT true, -- whether this time entry is billable to the client
    is_billed boolean DEFAULT false, -- whether this entry has been included in an invoice
    invoice_id character varying(64), -- FK to invoices table (once billed)
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- when the entry was recorded
    PRIMARY KEY (entry_id)
)
CREATE TABLE legal_services.invoices (
    invoice_id character varying(64) NOT NULL,  -- unique identifier for the invoice
    invoice_number character varying(100) UNIQUE NOT NULL, -- user-facing invoice number
    client_id character varying(64) NOT NULL, -- FK to clients table
    case_id character varying(64), -- FK to cases table (optional, could be general retainer)
    issue_date date NOT NULL, -- date the invoice was generated
    due_date date NOT NULL, -- date the payment is due
    total_amount numeric(12, 2) NOT NULL, -- total amount due on the invoice
    amount_paid numeric(12, 2) DEFAULT 0.00, -- amount already paid
    status character varying(50) NOT NULL, -- e.g., Draft, Sent, Paid, Partially Paid, Overdue, Void
    payment_date timestamp, -- date the invoice was fully paid (nullable)
    notes text, -- additional notes or terms on the invoice
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (invoice_id)
)
CREATE TABLE legal_services.appointments (
    appointment_id character varying(64) NOT NULL, -- unique identifier for the appointment
    client_id character varying(64) NOT NULL, -- FK to clients table
    lawyer_id character varying(64) NOT NULL, -- FK to lawyers table
    case_id character varying(64), -- FK to cases table (optional, if related to a specific case)
    start_time timestamp NOT NULL, -- scheduled start date and time
    end_time timestamp NOT NULL, -- scheduled end date and time
    location text, -- location of the meeting (address or virtual link)
    subject character varying(255), -- subject or purpose of the appointment
    notes text, -- additional notes for the appointment
    status character varying(50) NOT NULL, -- e.g., Scheduled, Completed, Canceled, Rescheduled
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (appointment_id)
)


[User] What is the maintenance schedule for platform 3 at station DEF for the next month?

[Assistant] I'm sorry, but I don't have access to the maintenance schedule for platforms. The data I have only includes static information about platform details such as ID, station, number, track, status, length, and accessibility. For maintenance schedules, you may need to consult the station management or relevant department.

System:
You are an SQL statement expert and you can refuse the user's question if the question is not related to the table structure. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE train_station_management.platforms ( platform_id text, station_id text, platform_number text, track_number text, status text, length_meters numeric, accessible boolean )


[User] List the medication_name and manufacturer for all medications where the description is null or an empty string.

[Assistant] SELECT medication_name, manufacturer FROM healthcare.medications WHERE description IS NULL OR description = '';

[User] Now, refine the query to only include medications whose ndc_code starts with '5'.

[Assistant] SELECT medication_name, manufacturer FROM healthcare.medications WHERE (description IS NULL OR description = '') AND ndc_code LIKE '5%';

System:
You are an SQL statement expert. Given the table structure described by the CREATE TABLE statement, write an SQL query that provides the solution to the user's question.
##Table Structure
CREATE TABLE healthcare.patients (
    patient_id character varying(64) NOT NULL,  -- unique identifier for the patient
    first_name character varying(100) NOT NULL, -- patient's first name
    last_name character varying(100) NOT NULL, -- patient's last name
    date_of_birth date NOT NULL, -- patient's date of birth
    gender character varying(10), -- patient's gender (e.g., Male, Female, Other)
    address text, -- patient's home address
    phone_number character varying(20), -- patient's phone number
    email character varying(128) UNIQUE, -- patient's email address
    emergency_contact_name character varying(200), -- name of emergency contact
    emergency_contact_phone character varying(20), -- phone number of emergency contact
    created_at timestamp with time zone NOT NULL DEFAULT current_timestamp, -- record creation time
    updated_at timestamp with time zone NOT NULL DEFAULT current_timestamp, -- record last update time
    PRIMARY KEY (patient_id)
)
CREATE TABLE healthcare.doctors (
    doctor_id character varying(64) NOT NULL,  -- unique identifier for the doctor
    first_name character varying(100) NOT NULL, -- doctor's first name
    last_name character varying(100) NOT NULL, -- doctor's last name
    specialty character varying(100) NOT NULL, -- doctor's medical specialty
    license_number character varying(50) UNIQUE NOT NULL, -- doctor's medical license number
    phone_number character varying(20), -- doctor's contact phone
    email character varying(128) UNIQUE, -- doctor's contact email
    hospital_affiliation_id character varying(64), -- FK to hospitals table (optional)
    created_at timestamp with time zone NOT NULL DEFAULT current_timestamp,
    updated_at timestamp with time zone NOT NULL DEFAULT current_timestamp,
    PRIMARY KEY (doctor_id)
)
CREATE TABLE healthcare.appointments (
    appointment_id character varying(64) NOT NULL, -- unique identifier for the appointment
    patient_id character varying(64) NOT NULL, -- FK to patients table
    doctor_id character varying(64) NOT NULL, -- FK to doctors table
    appointment_time timestamp with time zone NOT NULL, -- date and time of the appointment
    duration_minutes integer NOT NULL, -- expected duration in minutes
    reason text, -- reason for the visit
    status character varying(32) NOT NULL, -- e.g., Scheduled, Completed, Cancelled, No-show
    location_id character varying(64), -- FK to a potential locations/clinics table
    notes text, -- notes related to scheduling
    created_at timestamp with time zone NOT NULL DEFAULT current_timestamp,
    PRIMARY KEY (appointment_id)
)
CREATE TABLE healthcare.diagnoses (
    diagnosis_id character varying(64) NOT NULL, -- unique identifier for the diagnosis entry
    record_id character varying(64) NOT NULL, -- FK linking to the specific medical record entry
    patient_id character varying(64) NOT NULL, -- FK to patients table
    doctor_id character varying(64) NOT NULL, -- FK to doctors table (diagnosing doctor)
    diagnosis_code character varying(20) NOT NULL, -- standard code (e.g., ICD-10)
    code_type character varying(10) NOT NULL DEFAULT 'ICD-10', -- type of code used
    description text, -- textual description of the diagnosis
    diagnosis_date date NOT NULL, -- date the diagnosis was made
    status character varying(32) NOT NULL, -- e.g., Active, Resolved, Ruled Out
    is_chronic boolean DEFAULT false, -- flag for chronic conditions
    PRIMARY KEY (diagnosis_id)
)
CREATE TABLE healthcare.medications (
    medication_id character varying(64) NOT NULL, -- unique identifier for the medication type
    medication_name character varying(255) NOT NULL, -- common or brand name
    generic_name character varying(255), -- generic chemical name
    manufacturer character varying(100), -- drug manufacturer
    ndc_code character varying(20) UNIQUE, -- National Drug Code (optional but useful)
    description text, -- description of the medication
    PRIMARY KEY (medication_id)
)
CREATE TABLE healthcare.prescriptions (
    prescription_id character varying(64) NOT NULL, -- unique identifier for the prescription
    record_id character varying(64) NOT NULL, -- FK linking to the medical record where it was prescribed
    patient_id character varying(64) NOT NULL, -- FK to patients table
    doctor_id character varying(64) NOT NULL, -- FK to prescribing doctor
    medication_id character varying(64) NOT NULL, -- FK to medications table
    dosage character varying(100) NOT NULL, -- e.g., '100mg', '1 tablet'
    frequency character varying(100) NOT NULL, -- e.g., 'Once daily', 'Twice a day with meals'
    route character varying(50), -- e.g., 'Oral', 'Topical', 'Intravenous'
    start_date date NOT NULL, -- date prescription begins
    end_date date, -- date prescription ends (if applicable)
    quantity_dispensed numeric(10,2), -- amount dispensed (e.g., number of tablets)
    refills_allowed integer NOT NULL DEFAULT 0, -- number of allowed refills
    prescription_date timestamp with time zone NOT NULL DEFAULT current_timestamp,
    PRIMARY KEY (prescription_id)
)
CREATE TABLE healthcare.insurance_plans (
    plan_id character varying(64) NOT NULL, -- unique identifier for the insurance plan
    plan_name character varying(200) NOT NULL, -- name of the insurance plan
    insurance_provider character varying(100) NOT NULL, -- name of the insurance company
    plan_type character varying(50), -- e.g., PPO, HMO, EPO
    contact_phone character varying(20), -- provider contact number
    website character varying(255), -- provider website
    PRIMARY KEY (plan_id)
)
CREATE TABLE healthcare.patient_insurance (
    patient_insurance_id character varying(64) NOT NULL, -- unique identifier for this patient-plan link
    patient_id character varying(64) NOT NULL, -- FK to patients table
    plan_id character varying(64) NOT NULL, -- FK to insurance_plans table
    policy_number character varying(100) NOT NULL, -- patient's policy number
    group_number character varying(100), -- group number, if applicable
    subscriber_name character varying(200), -- name of the primary policy holder
    effective_date date NOT NULL, -- date the coverage begins
    expiration_date date, -- date the coverage ends (if known)
    is_primary boolean NOT NULL DEFAULT true, -- indicates if this is the primary insurance
    PRIMARY KEY (patient_insurance_id),
    UNIQUE (patient_id, plan_id, policy_number) -- ensure a patient doesn't have the same policy twice
)


[User] Can you help me retrieve the details of all bookings for a specific route with route_id 'RT789', including the passenger names and the scheduled departure times?

[Assistant]
SELECT b.booking_id, p.first_name, p.last_name, s.departure_datetime, b.status, b.total_price
FROM train_station_management.bookings b
JOIN train_station_management.passengers p ON b.passenger_id = p.passenger_id
JOIN train_station_management.schedules s ON b.schedule_id = s.schedule_id
WHERE s.route_id = 'RT789';

[User] Can you modify the query to include only bookings with a status of 'Pending'?

[Assistant]
SELECT b.booking_id, p.first_name, p.last_name, s.departure_datetime, b.status, b.total_price
FROM train_station_management.bookings b
JOIN train_station_management.passengers p ON b.passenger_id = p.passenger_id
JOIN train_station_management.schedules s ON b.schedule_id = s.schedule_id
WHERE s.route_id = 'RT789' AND b.status = 'Pending';

[User] Can you also add the route name and origin station ID to the results?

[Assistant]
SELECT b.booking_id, p.first_name, p.last_name, s.departure_datetime, b.status, b.total_price, r.route_name, r.origin_station_id
FROM train_station_management.bookings b
JOIN train_station_management.passengers p ON b.passenger_id = p.passenger_id
JOIN train_station_management.schedules s ON b.schedule_id = s.schedule_id
JOIN train_station_management.routes r ON s.route_id = r.route_id
WHERE s.route_id = 'RT789' AND b.status = 'Pending';

[User] Can you sort the results by departure datetime in descending order?

[Assistant]
SELECT b.booking_id, p.first_name, p.last_name, s.departure_datetime, b.status, b.total_price, r.route_name, r.origin_station_id
FROM train_station_management.bookings b
JOIN train_station_management.passengers p ON b.passenger_id = p.passenger_id
JOIN train_station_management.schedules s ON b.schedule_id = s.schedule_id
JOIN train_station_management.routes r ON s.route_id = r.route_id
WHERE s.route_id = 'RT789' AND b.status = 'Pending'
ORDER BY s.departure_datetime DESC;

System:
You are an expert in writing database language. You can write a corresponding database language query to answer the user's question based on the table structure described by the table creation statement.
##Table Structure
CREATE TABLE train_station_management.train_cars (
    car_id character varying(64) NOT NULL, -- Unique identifier for the train car
    train_id character varying(64) NOT NULL, -- Foreign key referencing trains
    car_number character varying(10) NOT NULL, -- Identifier of the car within the train set
    car_type character varying(64) NOT NULL, -- e.g., Locomotive, Passenger, Sleeper, Dining, Baggage
    class character varying(32), -- e.g., First, Business, Economy (null for non-passenger cars)
    capacity integer, -- Passenger capacity of this specific car (null for non-passenger cars)
    features text, -- Comma-separated list of features (e.g., 'WiFi', 'Power Outlet', 'Accessible Restroom')
    PRIMARY KEY (car_id),
    FOREIGN KEY (train_id) REFERENCES train_station_management.trains(train_id)
)
CREATE TABLE train_station_management.routes (
    route_id character varying(64) NOT NULL, -- Unique identifier for the route
    route_name character varying(128) NOT NULL, -- Name of the route (e.g., 'Northeast Corridor')
    description text, -- Description of the route
    origin_station_id character varying(64) NOT NULL, -- Starting station
    destination_station_id character varying(64) NOT NULL, -- Final station
    is_active boolean NOT NULL DEFAULT true, -- Is the route currently operational?
    PRIMARY KEY (route_id),
    FOREIGN KEY (origin_station_id) REFERENCES train_station_management.stations(station_id),
    FOREIGN KEY (destination_station_id) REFERENCES train_station_management.stations(station_id)
)
CREATE TABLE train_station_management.route_stations (
    route_station_id character varying(64) NOT NULL, -- Unique ID for this route-station link
    route_id character varying(64) NOT NULL, -- Foreign key referencing routes
    station_id character varying(64) NOT NULL, -- Foreign key referencing stations
    sequence_order integer NOT NULL, -- Order of the station in the route (1 for origin, 2, 3...)
    distance_from_previous_km numeric(10, 2), -- Distance from the previous station in the sequence
    typical_stop_duration_minutes integer, -- Typical dwell time at this station
    PRIMARY KEY (route_station_id),
    UNIQUE (route_id, station_id),
    UNIQUE (route_id, sequence_order),
    FOREIGN KEY (route_id) REFERENCES train_station_management.routes(route_id),
    FOREIGN KEY (station_id) REFERENCES train_station_management.stations(station_id)
)
CREATE TABLE train_station_management.schedules (
    schedule_id character varying(64) NOT NULL, -- Unique identifier for a specific scheduled trip
    train_id character varying(64) NOT NULL, -- Foreign key referencing the train used
    route_id character varying(64) NOT NULL, -- Foreign key referencing the route taken
    departure_datetime timestamp with time zone NOT NULL, -- Scheduled departure time from origin station
    arrival_datetime timestamp with time zone NOT NULL, -- Scheduled arrival time at destination station
    status character varying(32) NOT NULL DEFAULT 'Scheduled', -- e.g., Scheduled, On Time, Delayed, Cancelled, Arrived
    notes text, -- Any notes regarding this specific trip (e.g., reason for delay)
    PRIMARY KEY (schedule_id),
    FOREIGN KEY (train_id) REFERENCES train_station_management.trains(train_id),
    FOREIGN KEY (route_id) REFERENCES train_station_management.routes(route_id)
)
CREATE TABLE train_station_management.passengers (
    passenger_id character varying(64) NOT NULL, -- Unique identifier for the passenger
    first_name character varying(100) NOT NULL, -- Passenger's first name
    last_name character varying(100) NOT NULL, -- Passenger's last name
    email character varying(128) UNIQUE, -- Passenger's email address
    phone_number character varying(32) UNIQUE, -- Passenger's phone number
    date_of_birth date, -- Passenger's date of birth
    loyalty_program_id character varying(64), -- ID for loyalty program, if applicable
    created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- When the passenger record was created
    PRIMARY KEY (passenger_id)
)
CREATE TABLE train_station_management.bookings (
    booking_id character varying(64) NOT NULL, -- Unique identifier for the booking
    passenger_id character varying(64) NOT NULL, -- Foreign key referencing the passenger
    schedule_id character varying(64) NOT NULL, -- Foreign key referencing the scheduled trip
    booking_datetime timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, -- When the booking was made
    status character varying(32) NOT NULL DEFAULT 'Confirmed', -- e.g., Confirmed, Cancelled, Pending
    total_price numeric(12, 2) NOT NULL, -- Total price for all tickets in this booking
    currency_code character varying(3) NOT NULL DEFAULT 'USD', -- Currency of the price
    special_requests text, -- Any special requests (e.g., wheelchair assistance)
    PRIMARY KEY (booking_id),
    FOREIGN KEY (passenger_id) REFERENCES train_station_management.passengers(passenger_id),
    FOREIGN KEY (schedule_id) REFERENCES train_station_management.schedules(schedule_id)
)
CREATE TABLE train_station_management.staff (
    staff_id character varying(64) NOT NULL, -- Unique identifier for the staff member
    first_name character varying(100) NOT NULL,
    last_name character varying(100) NOT NULL,
    role character varying(64) NOT NULL, -- e.g., Station Master, Ticket Agent, Conductor, Engineer, Maintenance Crew
    primary_station_id character varying(64), -- Base station for the staff member (nullable for mobile staff)
    employee_number character varying(32) UNIQUE NOT NULL, -- Unique employee identifier
    hire_date date NOT NULL,
    contact_email character varying(128) UNIQUE,
    contact_phone character varying(32),
    is_active boolean NOT NULL DEFAULT true, -- Is the staff member currently employed?
    PRIMARY KEY (staff_id),
    FOREIGN KEY (primary_station_id) REFERENCES train_station_management.stations(station_id)
)