question,sql,schema_context,domain,difficulty,query_type
How many customers are from France?,SELECT COUNT(*) AS customer_count FROM customers WHERE country = 'France';,"  customers(customer_id, name, email, city, country, created_at, total_spent)
  orders(order_id, customer_id, order_date, status, total_amount, shipping_city)
  order_items(item_id, order_id, product_id, quantity, unit_price)
  products(product_id, name, category, price, stock_quantity, supplier_id)
  suppliers(supplier_id, name, country, rating)",ecommerce,easy,aggregate
How many products are in the 'Books' category?,SELECT COUNT(*) FROM products WHERE category = 'Books';,"  customers(customer_id, name, email, city, country, created_at, total_spent)
  orders(order_id, customer_id, order_date, status, total_amount, shipping_city)
  order_items(item_id, order_id, product_id, quantity, unit_price)
  products(product_id, name, category, price, stock_quantity, supplier_id)
  suppliers(supplier_id, name, country, rating)",ecommerce,easy,aggregate
How many orders were placed in 2022?,SELECT COUNT(*) AS order_count FROM orders WHERE EXTRACT(YEAR FROM order_date) = 2022;,"  customers(customer_id, name, email, city, country, created_at, total_spent)
  orders(order_id, customer_id, order_date, status, total_amount, shipping_city)
  order_items(item_id, order_id, product_id, quantity, unit_price)
  products(product_id, name, category, price, stock_quantity, supplier_id)
  suppliers(supplier_id, name, country, rating)",ecommerce,easy,aggregate
What is the total revenue from all orders?,SELECT SUM(total_amount) AS total_revenue FROM orders;,"  customers(customer_id, name, email, city, country, created_at, total_spent)
  orders(order_id, customer_id, order_date, status, total_amount, shipping_city)
  order_items(item_id, order_id, product_id, quantity, unit_price)
  products(product_id, name, category, price, stock_quantity, supplier_id)
  suppliers(supplier_id, name, country, rating)",ecommerce,easy,aggregate
What is the total revenue from 'cancelled' orders?,SELECT SUM(total_amount) AS revenue FROM orders WHERE status = 'cancelled';,"  customers(customer_id, name, email, city, country, created_at, total_spent)
  orders(order_id, customer_id, order_date, status, total_amount, shipping_city)
  order_items(item_id, order_id, product_id, quantity, unit_price)
  products(product_id, name, category, price, stock_quantity, supplier_id)
  suppliers(supplier_id, name, country, rating)",ecommerce,easy,aggregate
How many female patients are there?,SELECT COUNT(*) FROM patients WHERE gender = 'F';,"  patients(patient_id, name, date_of_birth, gender, city, insurance_type)
  doctors(doctor_id, name, specialty, hospital_id, years_experience)
  appointments(appointment_id, patient_id, doctor_id, appointment_date, status, diagnosis)
  hospitals(hospital_id, name, city, beds, rating)
  prescriptions(prescription_id, appointment_id, medication, dosage, duration_days)",healthcare,easy,aggregate
Show all doctors with specialty 'Cardiology'.,SELECT * FROM doctors WHERE specialty = 'Cardiology';,"  patients(patient_id, name, date_of_birth, gender, city, insurance_type)
  doctors(doctor_id, name, specialty, hospital_id, years_experience)
  appointments(appointment_id, patient_id, doctor_id, appointment_date, status, diagnosis)
  hospitals(hospital_id, name, city, beds, rating)
  prescriptions(prescription_id, appointment_id, medication, dosage, duration_days)",healthcare,easy,select
List prescriptions with duration longer than 30 days.,SELECT * FROM prescriptions WHERE duration_days > 30;,"  patients(patient_id, name, date_of_birth, gender, city, insurance_type)
  doctors(doctor_id, name, specialty, hospital_id, years_experience)
  appointments(appointment_id, patient_id, doctor_id, appointment_date, status, diagnosis)
  hospitals(hospital_id, name, city, beds, rating)
  prescriptions(prescription_id, appointment_id, medication, dosage, duration_days)",healthcare,easy,select
How many 'logout' events occurred in the last 30 days?,"SELECT COUNT(*) FROM events
WHERE event_type = 'logout' AND event_date >= CURRENT_DATE - INTERVAL '30 days';","  events(event_id, user_id, event_type, event_date, page, session_id, duration_seconds)
  users(user_id, username, signup_date, plan, country, is_active)
  sessions(session_id, user_id, start_time, end_time, device, browser)
  pages(page_id, url, title, category, created_at)
  conversions(conversion_id, user_id, event_date, revenue, campaign_id)",analytics,easy,aggregate
How many distinct event types are there?,SELECT COUNT(DISTINCT event_type) AS event_type_count FROM events;,"  events(event_id, user_id, event_type, event_date, page, session_id, duration_seconds)
  users(user_id, username, signup_date, plan, country, is_active)
  sessions(session_id, user_id, start_time, end_time, device, browser)
  pages(page_id, url, title, category, created_at)
  conversions(conversion_id, user_id, event_date, revenue, campaign_id)",analytics,easy,aggregate
What is the average bonus paid in 2023?,SELECT AVG(bonus) FROM performance_reviews WHERE review_year = 2023;,"  employees(employee_id, name, department_id, manager_id, hire_date, salary, city)
  departments(department_id, name, location, budget, head_count)
  projects(project_id, name, department_id, start_date, end_date, budget)
  assignments(assignment_id, employee_id, project_id, role, hours_per_week)
  performance_reviews(review_id, employee_id, review_year, rating, bonus)",hr,easy,aggregate
Find the employee with the longest tenure.,"SELECT name, hire_date, CURRENT_DATE - hire_date AS tenure_days
FROM employees ORDER BY hire_date ASC LIMIT 1;","  employees(employee_id, name, department_id, manager_id, hire_date, salary, city)
  departments(department_id, name, location, budget, head_count)
  projects(project_id, name, department_id, start_date, end_date, budget)
  assignments(assignment_id, employee_id, project_id, role, hours_per_week)
  performance_reviews(review_id, employee_id, review_year, rating, bonus)",hr,easy,select
List all items in the 'Raw Materials' category.,SELECT * FROM items WHERE category = 'Raw Materials';,"  warehouses(warehouse_id, name, city, country, capacity)
  items(item_id, name, sku, category, unit_cost, reorder_point)
  stock(stock_id, item_id, warehouse_id, quantity, last_updated)
  movements(movement_id, item_id, warehouse_id, movement_type, quantity, movement_date)
  vendors(vendor_id, name, country, lead_time_days, reliability_score)",inventory,easy,select
How many 'shipment' movements happened this month?,"SELECT COUNT(*) FROM movements
WHERE movement_type = 'shipment' AND DATE_TRUNC('month', movement_date) = DATE_TRUNC('month', CURRENT_DATE);","  warehouses(warehouse_id, name, city, country, capacity)
  items(item_id, name, sku, category, unit_cost, reorder_point)
  stock(stock_id, item_id, warehouse_id, quantity, last_updated)
  movements(movement_id, item_id, warehouse_id, movement_type, quantity, movement_date)
  vendors(vendor_id, name, country, lead_time_days, reliability_score)",inventory,easy,aggregate
Which month had the most orders in 2023?,"SELECT EXTRACT(MONTH FROM order_date) AS month, COUNT(*) AS orders
FROM orders WHERE EXTRACT(YEAR FROM order_date) = 2023
GROUP BY month ORDER BY orders DESC LIMIT 1;","  customers(customer_id, name, email, city, country, created_at, total_spent)
  orders(order_id, customer_id, order_date, status, total_amount, shipping_city)
  order_items(item_id, order_id, product_id, quantity, unit_price)
  products(product_id, name, category, price, stock_quantity, supplier_id)
  suppliers(supplier_id, name, country, rating)",ecommerce,medium,aggregate
Find the customer who placed the most recent order.,"SELECT c.name, MAX(o.order_date) AS last_order
FROM orders o JOIN customers c ON o.customer_id = c.customer_id
GROUP BY c.customer_id, c.name ORDER BY last_order DESC LIMIT 1;","  customers(customer_id, name, email, city, country, created_at, total_spent)
  orders(order_id, customer_id, order_date, status, total_amount, shipping_city)
  order_items(item_id, order_id, product_id, quantity, unit_price)
  products(product_id, name, category, price, stock_quantity, supplier_id)
  suppliers(supplier_id, name, country, rating)",ecommerce,medium,aggregate
Find customers who have placed more than 5 orders.,"SELECT customer_id, COUNT(*) AS order_count
FROM orders
GROUP BY customer_id
HAVING COUNT(*) > 5
ORDER BY order_count DESC;","  customers(customer_id, name, email, city, country, created_at, total_spent)
  orders(order_id, customer_id, order_date, status, total_amount, shipping_city)
  order_items(item_id, order_id, product_id, quantity, unit_price)
  products(product_id, name, category, price, stock_quantity, supplier_id)
  suppliers(supplier_id, name, country, rating)",ecommerce,medium,aggregate
"How many patients does each hospital serve, by doctor specialty?","SELECT h.name AS hospital_name, d.specialty, COUNT(DISTINCT a.patient_id) AS patient_count
FROM appointments a
JOIN doctors d ON a.doctor_id = d.doctor_id
JOIN hospitals h ON d.hospital_id = h.hospital_id
GROUP BY h.name, d.specialty
ORDER BY patient_count DESC;","  patients(patient_id, name, date_of_birth, gender, city, insurance_type)
  doctors(doctor_id, name, specialty, hospital_id, years_experience)
  appointments(appointment_id, patient_id, doctor_id, appointment_date, status, diagnosis)
  hospitals(hospital_id, name, city, beds, rating)
  prescriptions(prescription_id, appointment_id, medication, dosage, duration_days)",healthcare,medium,aggregate
"Show all appointments with patient name, doctor name, and diagnosis.","SELECT a.appointment_id, p.name AS patient_name, d.name AS doctor_name,
a.appointment_date, a.diagnosis
FROM appointments a
JOIN patients p ON a.patient_id = p.patient_id
JOIN doctors d ON a.doctor_id = d.doctor_id;","  patients(patient_id, name, date_of_birth, gender, city, insurance_type)
  doctors(doctor_id, name, specialty, hospital_id, years_experience)
  appointments(appointment_id, patient_id, doctor_id, appointment_date, status, diagnosis)
  hospitals(hospital_id, name, city, beds, rating)
  prescriptions(prescription_id, appointment_id, medication, dosage, duration_days)",healthcare,medium,join
Find all employees and their manager's name.,"SELECT e.name AS employee, m.name AS manager
FROM employees e
LEFT JOIN employees m ON e.manager_id = m.employee_id
ORDER BY m.name NULLS LAST, e.name;","  employees(employee_id, name, department_id, manager_id, hire_date, salary, city)
  departments(department_id, name, location, budget, head_count)
  projects(project_id, name, department_id, start_date, end_date, budget)
  assignments(assignment_id, employee_id, project_id, role, hours_per_week)
  performance_reviews(review_id, employee_id, review_year, rating, bonus)",hr,medium,join
Which department had the highest average rating in 2024?,"SELECT d.name, AVG(pr.rating) AS avg_rating
FROM performance_reviews pr
JOIN employees e ON pr.employee_id = e.employee_id
JOIN departments d ON e.department_id = d.department_id
WHERE pr.review_year = 2024
GROUP BY d.name ORDER BY avg_rating DESC LIMIT 1;","  employees(employee_id, name, department_id, manager_id, hire_date, salary, city)
  departments(department_id, name, location, budget, head_count)
  projects(project_id, name, department_id, start_date, end_date, budget)
  assignments(assignment_id, employee_id, project_id, role, hours_per_week)
  performance_reviews(review_id, employee_id, review_year, rating, bonus)",hr,medium,aggregate
What is the total revenue from 'free' plan users?,"SELECT SUM(c.revenue) FROM conversions c
JOIN users u ON c.user_id = u.user_id WHERE u.plan = 'free';","  events(event_id, user_id, event_type, event_date, page, session_id, duration_seconds)
  users(user_id, username, signup_date, plan, country, is_active)
  sessions(session_id, user_id, start_time, end_time, device, browser)
  pages(page_id, url, title, category, created_at)
  conversions(conversion_id, user_id, event_date, revenue, campaign_id)",analytics,medium,join
What is the total stock value for 'Consumables' items?,"SELECT SUM(s.quantity * i.unit_cost) AS total_value
FROM stock s JOIN items i ON s.item_id = i.item_id
WHERE i.category = 'Consumables';","  warehouses(warehouse_id, name, city, country, capacity)
  items(item_id, name, sku, category, unit_cost, reorder_point)
  stock(stock_id, item_id, warehouse_id, quantity, last_updated)
  movements(movement_id, item_id, warehouse_id, movement_type, quantity, movement_date)
  vendors(vendor_id, name, country, lead_time_days, reliability_score)",inventory,medium,join
"Calculate a running total of order revenue per customer, ordered by date.","SELECT customer_id, order_date, total_amount,
SUM(total_amount) OVER (PARTITION BY customer_id ORDER BY order_date) AS running_total
FROM orders;","  customers(customer_id, name, email, city, country, created_at, total_spent)
  orders(order_id, customer_id, order_date, status, total_amount, shipping_city)
  order_items(item_id, order_id, product_id, quantity, unit_price)
  products(product_id, name, category, price, stock_quantity, supplier_id)
  suppliers(supplier_id, name, country, rating)",ecommerce,hard,window
Find the specialty with the highest average patient age.,"SELECT d.specialty, AVG(EXTRACT(YEAR FROM AGE(p.date_of_birth))) AS avg_patient_age
FROM appointments a
JOIN doctors d ON a.doctor_id = d.doctor_id
JOIN patients p ON a.patient_id = p.patient_id
GROUP BY d.specialty
ORDER BY avg_patient_age DESC
LIMIT 1;","  patients(patient_id, name, date_of_birth, gender, city, insurance_type)
  doctors(doctor_id, name, specialty, hospital_id, years_experience)
  appointments(appointment_id, patient_id, doctor_id, appointment_date, status, diagnosis)
  hospitals(hospital_id, name, city, beds, rating)
  prescriptions(prescription_id, appointment_id, medication, dosage, duration_days)",healthcare,hard,aggregate
"Using a CTE, find each department's headcount and its share of total company headcount.","WITH dept_counts AS (
SELECT department_id, COUNT(*) AS headcount
FROM employees
GROUP BY department_id
),
total AS (
SELECT SUM(headcount) AS company_total FROM dept_counts
)
SELECT d.name, dc.headcount,
ROUND(100.0 * dc.headcount / t.company_total, 2) AS pct_of_company
FROM dept_counts dc
JOIN departments d ON dc.department_id = d.department_id
CROSS JOIN total t
ORDER BY dc.headcount DESC;","  employees(employee_id, name, department_id, manager_id, hire_date, salary, city)
  departments(department_id, name, location, budget, head_count)
  projects(project_id, name, department_id, start_date, end_date, budget)
  assignments(assignment_id, employee_id, project_id, role, hours_per_week)
  performance_reviews(review_id, employee_id, review_year, rating, bonus)",hr,hard,cte
Find users who converted but never triggered a 'purchase' event.,"SELECT DISTINCT u.user_id, u.username
FROM conversions c
JOIN users u ON c.user_id = u.user_id
WHERE u.user_id NOT IN (
SELECT user_id FROM events WHERE event_type = 'purchase'
);","  events(event_id, user_id, event_type, event_date, page, session_id, duration_seconds)
  users(user_id, username, signup_date, plan, country, is_active)
  sessions(session_id, user_id, start_time, end_time, device, browser)
  pages(page_id, url, title, category, created_at)
  conversions(conversion_id, user_id, event_date, revenue, campaign_id)",analytics,hard,subquery
Calculate inventory turnover per item (shipments / average stock).,"WITH shipped AS (
SELECT item_id, SUM(quantity) AS total_shipped
FROM movements WHERE movement_type = 'shipment'
GROUP BY item_id
),
avg_stock AS (
SELECT item_id, AVG(quantity) AS avg_qty FROM stock GROUP BY item_id
)
SELECT i.name, s.total_shipped, a.avg_qty,
ROUND(s.total_shipped::numeric / NULLIF(a.avg_qty, 0), 2) AS turnover_ratio
FROM items i
JOIN shipped s ON i.item_id = s.item_id
JOIN avg_stock a ON i.item_id = a.item_id
ORDER BY turnover_ratio DESC;","  warehouses(warehouse_id, name, city, country, capacity)
  items(item_id, name, sku, category, unit_cost, reorder_point)
  stock(stock_id, item_id, warehouse_id, quantity, last_updated)
  movements(movement_id, item_id, warehouse_id, movement_type, quantity, movement_date)
  vendors(vendor_id, name, country, lead_time_days, reliability_score)",inventory,hard,cte