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How many students does each advisor have?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : How many students does each advisor have?
SELECT advisor, COUNT_BIG(*) FROM Student GROUP BY advisor
Which advisor has most number of students?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Which advisor has most number of students?
SELECT TOP 1 advisor FROM Student GROUP BY advisor ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
Give the advisor with the most students.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Give the advisor with the most students.
SELECT TOP 1 advisor FROM Student GROUP BY advisor ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
How many students have cat allergies?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : How many students have cat allergies?
SELECT COUNT_BIG(*) FROM Has_allergy WHERE Allergy = [Cat]
How many students are affected by cat allergies?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : How many students are affected by cat allergies?
SELECT COUNT_BIG(*) FROM Has_allergy WHERE Allergy = [Cat]
Show all student IDs who have at least two allergies.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Show all student IDs who have at least two allergies.
SELECT StuID FROM Has_allergy GROUP BY StuID HAVING COUNT_BIG(*) >= 2
What are the students ids of students who have more than one allergy?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : What are the students ids of students who have more than o...
SELECT StuID FROM Has_allergy GROUP BY StuID HAVING COUNT_BIG(*) >= 2
What are the student ids of students who don't have any allergies?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : What are the student ids of students who don't have any al...
SELECT StuID FROM Student EXCEPT SELECT StuID FROM Has_allergy
Which students are unaffected by allergies?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Which students are unaffected by allergies?
SELECT StuID FROM Student EXCEPT SELECT StuID FROM Has_allergy
How many female students have milk or egg allergies?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : How many female students have milk or egg allergies?
SELECT COUNT_BIG(*) FROM has_allergy AS T1 JOIN Student AS T2 ON T1.StuID = T2.StuID WHERE T2.sex = [F] AND T1.allergy = [Milk] OR T1.allergy = [Eggs]
How many students who are female are allergic to milk or eggs?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : How many students who are female are allergic to milk or e...
SELECT COUNT_BIG(*) FROM has_allergy AS T1 JOIN Student AS T2 ON T1.StuID = T2.StuID WHERE T2.sex = [F] AND T1.allergy = [Milk] OR T1.allergy = [Eggs]
How many students have a food allergy?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : How many students have a food allergy?
SELECT COUNT_BIG(*) FROM Has_allergy AS T1 JOIN Allergy_type AS T2 ON T1.allergy = T2.allergy WHERE T2.allergytype = [food]
How many students are affected by food related allergies?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : How many students are affected by food related allergies?
SELECT COUNT_BIG(*) FROM Has_allergy AS T1 JOIN Allergy_type AS T2 ON T1.allergy = T2.allergy WHERE T2.allergytype = [food]
Which allergy has most number of students affected?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Which allergy has most number of students affected?
SELECT TOP 1 Allergy FROM Has_allergy GROUP BY Allergy ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
Which allergy is the most common?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Which allergy is the most common?
SELECT TOP 1 Allergy FROM Has_allergy GROUP BY Allergy ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
Show all allergies with number of students affected.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Show all allergies with number of students affected.
SELECT Allergy, COUNT_BIG(*) FROM Has_allergy GROUP BY Allergy
How many students have each different allergy?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : How many students have each different allergy?
SELECT Allergy, COUNT_BIG(*) FROM Has_allergy GROUP BY Allergy
Show all allergy type with number of students affected.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Show all allergy type with number of students affected.
SELECT T2.allergytype, COUNT_BIG(*) FROM Has_allergy AS T1 JOIN Allergy_type AS T2 ON T1.allergy = T2.allergy GROUP BY T2.allergytype
How many students are affected by each allergy type?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : How many students are affected by each allergy type?
SELECT T2.allergytype, COUNT_BIG(*) FROM Has_allergy AS T1 JOIN Allergy_type AS T2 ON T1.allergy = T2.allergy GROUP BY T2.allergytype
Find the last name and age of the student who has allergy to both milk and cat.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Find the last name and age of the student who has allergy ...
SELECT lname, age FROM Student WHERE StuID IN (SELECT StuID FROM Has_allergy WHERE Allergy = [Milk] INTERSECT SELECT StuID FROM Has_allergy WHERE Allergy = [Cat])
What are the last names and ages of the students who are allergic to milk and cat?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : What are the last names and ages of the students who are a...
SELECT lname, age FROM Student WHERE StuID IN (SELECT StuID FROM Has_allergy WHERE Allergy = [Milk] INTERSECT SELECT StuID FROM Has_allergy WHERE Allergy = [Cat])
What are the allergies and their types that the student with first name Lisa has? And order the result by name of allergies.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : What are the allergies and their types that the student wi...
SELECT T1.Allergy, T1.AllergyType FROM Allergy_type AS T1 JOIN Has_allergy AS T2 ON T1.Allergy = T2.Allergy JOIN Student AS T3 ON T3.StuID = T2.StuID WHERE T3.Fname = [Lisa] ORDER BY CASE WHEN T1.Allergy IS NULL THEN 1 ELSE 0 END, T1.Allergy
What are the allergies the girl named Lisa has? And what are the types of them? Order the result by allergy names.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : What are the allergies the girl named Lisa has? And what a...
SELECT T1.Allergy, T1.AllergyType FROM Allergy_type AS T1 JOIN Has_allergy AS T2 ON T1.Allergy = T2.Allergy JOIN Student AS T3 ON T3.StuID = T2.StuID WHERE T3.Fname = [Lisa] ORDER BY CASE WHEN T1.Allergy IS NULL THEN 1 ELSE 0 END, T1.Allergy
Find the first name and gender of the student who has allergy to milk but not cat.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Find the first name and gender of the student who has alle...
SELECT fname, sex FROM Student WHERE StuID IN (SELECT StuID FROM Has_allergy WHERE Allergy = [Milk] EXCEPT SELECT StuID FROM Has_allergy WHERE Allergy = [Cat])
What are the first name and gender of the students who have allergy to milk but can put up with cats?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : What are the first name and gender of the students who hav...
SELECT fname, sex FROM Student WHERE StuID IN (SELECT StuID FROM Has_allergy WHERE Allergy = [Milk] EXCEPT SELECT StuID FROM Has_allergy WHERE Allergy = [Cat])
Find the average age of the students who have allergies with food and animal types.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Find the average age of the students who have allergies wi...
SELECT AVG(age) FROM Student WHERE StuID IN (SELECT T1.StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy = T2.Allergy WHERE T2.allergytype = [food] INTERSECT SELECT T1.StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy = T2.Allergy WHERE T2.allergytype = [animal])
How old are the students with allergies to food and animal types on average?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : How old are the students with allergies to food and animal...
SELECT AVG(age) FROM Student WHERE StuID IN (SELECT T1.StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy = T2.Allergy WHERE T2.allergytype = [food] INTERSECT SELECT T1.StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy = T2.Allergy WHERE T2.allergytype = [animal])
List the first and last name of the students who do not have any food type allergy.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : List the first and last name of the students who do not ha...
SELECT fname, lname FROM Student WHERE NOT StuID IN (SELECT T1.StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy = T2.Allergy WHERE T2.allergytype = [food])
What is the full name of each student who is not allergic to any type of food.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : What is the full name of each student who is not allergic ...
SELECT fname, lname FROM Student WHERE NOT StuID IN (SELECT T1.StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy = T2.Allergy WHERE T2.allergytype = [food])
Find the number of male (sex is 'M') students who have some food type allery.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Find the number of male (sex is 'M') students who have som...
SELECT COUNT_BIG(*) FROM Student WHERE sex = [M] AND StuID IN (SELECT StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy = T2.Allergy WHERE T2.allergytype = [food])
How many male students (sex is 'M') are allergic to any type of food?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : How many male students (sex is 'M') are allergic to any ty...
SELECT COUNT_BIG(*) FROM Student WHERE sex = [M] AND StuID IN (SELECT StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy = T2.Allergy WHERE T2.allergytype = [food])
Find the different first names and cities of the students who have allergy to milk or cat.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Find the different first names and cities of the students ...
SELECT DISTINCT T1.fname, T1.city_code FROM Student AS T1 JOIN Has_Allergy AS T2 ON T1.stuid = T2.stuid WHERE T2.Allergy = [Milk] OR T2.Allergy = [Cat]
What are the distinct first names and cities of the students who have allergy either to milk or to cat?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : What are the distinct first names and cities of the studen...
SELECT DISTINCT T1.fname, T1.city_code FROM Student AS T1 JOIN Has_Allergy AS T2 ON T1.stuid = T2.stuid WHERE T2.Allergy = [Milk] OR T2.Allergy = [Cat]
Find the number of students who are older than 18 and do not have allergy to either food or animal.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Find the number of students who are older than 18 and do n...
SELECT COUNT_BIG(*) FROM Student WHERE age > 18 AND NOT StuID IN (SELECT StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy = T2.Allergy WHERE T2.allergytype = [food] OR T2.allergytype = [animal])
How many students are over 18 and do not have allergy to food type or animal type?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : How many students are over 18 and do not have allergy to f...
SELECT COUNT_BIG(*) FROM Student WHERE age > 18 AND NOT StuID IN (SELECT StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy = T2.Allergy WHERE T2.allergytype = [food] OR T2.allergytype = [animal])
Find the first name and major of the students who are not allegry to soy.
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : Find the first name and major of the students who are not ...
SELECT fname, major FROM Student WHERE NOT StuID IN (SELECT StuID FROM Has_allergy WHERE Allergy = [Soy])
What are the first name and major of the students who are able to consume soy?
-- Tables de la base de données (T-SQL) -- TABLE [student] ( [stuid] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [age] INT, [sex] NVARCHAR(MAX), [major] INT, [advisor] INT, [city code] NVARCHAR(MAX) ); Question : What are the first name and major of the students who are ...
SELECT fname, major FROM Student WHERE NOT StuID IN (SELECT StuID FROM Has_allergy WHERE Allergy = [Soy])
A list of the top 5 countries by number of invoices. List country name and number of invoices.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 5 billing_country, COUNT_BIG(*) FROM invoices GROUP BY billing_country ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
What are the top 5 countries by number of invoices and how many do they have?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 5 billing_country, COUNT_BIG(*) FROM invoices GROUP BY billing_country ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
A list of the top 8 countries by gross/total invoice size. List country name and gross invoice size.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 8 billing_country, SUM(total) FROM invoices GROUP BY billing_country ORDER BY CASE WHEN SUM(total) IS NULL THEN 1 ELSE 0 END DESC, SUM(total) DESC
What are the names of the top 8 countries by total invoice size and what are those sizes?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 8 billing_country, SUM(total) FROM invoices GROUP BY billing_country ORDER BY CASE WHEN SUM(total) IS NULL THEN 1 ELSE 0 END DESC, SUM(total) DESC
A list of the top 10 countries by average invoice size. List country name and average invoice size.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 10 billing_country, AVG(total) FROM invoices GROUP BY billing_country ORDER BY CASE WHEN AVG(total) IS NULL THEN 1 ELSE 0 END DESC, AVG(total) DESC
What are the names of the countries and average invoice size of the top countries by size?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 10 billing_country, AVG(total) FROM invoices GROUP BY billing_country ORDER BY CASE WHEN AVG(total) IS NULL THEN 1 ELSE 0 END DESC, AVG(total) DESC
Find out 5 customers who most recently purchased something. List customers' first and last name.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 5 T1.first_name, T1.last_name FROM customers AS T1 JOIN invoices AS T2 ON T2.customer_id = T1.id ORDER BY CASE WHEN T2.invoice_date IS NULL THEN 1 ELSE 0 END DESC, T2.invoice_date DESC
What are the first and last names of the 5 customers who purchased something most recently?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 5 T1.first_name, T1.last_name FROM customers AS T1 JOIN invoices AS T2 ON T2.customer_id = T1.id ORDER BY CASE WHEN T2.invoice_date IS NULL THEN 1 ELSE 0 END DESC, T2.invoice_date DESC
Find out the top 10 customers by total number of orders. List customers' first and last name and the number of total orders.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 10 T1.first_name, T1.last_name, COUNT_BIG(*) FROM customers AS T1 JOIN invoices AS T2 ON T2.customer_id = T1.id GROUP BY T1.id ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
What are the top 10 customers' first and last names by total number of orders and how many orders did they make?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 10 T1.first_name, T1.last_name, COUNT_BIG(*) FROM customers AS T1 JOIN invoices AS T2 ON T2.customer_id = T1.id GROUP BY T1.id ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
List the top 10 customers by total gross sales. List customers' first and last name and total gross sales.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 10 T1.first_name, T1.last_name, SUM(T2.total) FROM customers AS T1 JOIN invoices AS T2 ON T2.customer_id = T1.id GROUP BY T1.id ORDER BY CASE WHEN SUM(T2.total) IS NULL THEN 1 ELSE 0 END DESC, SUM(T2.total) DESC
What are the top 10 customers' first and last names with the highest gross sales, and also what are the sales?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 10 T1.first_name, T1.last_name, SUM(T2.total) FROM customers AS T1 JOIN invoices AS T2 ON T2.customer_id = T1.id GROUP BY T1.id ORDER BY CASE WHEN SUM(T2.total) IS NULL THEN 1 ELSE 0 END DESC, SUM(T2.total) DESC
List the top 5 genres by number of tracks. List genres name and total tracks.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 5 T1.name, COUNT_BIG(*) FROM genres AS T1 JOIN tracks AS T2 ON T2.genre_id = T1.id GROUP BY T1.id ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
How many tracks does each genre have and what are the names of the top 5?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 5 T1.name, COUNT_BIG(*) FROM genres AS T1 JOIN tracks AS T2 ON T2.genre_id = T1.id GROUP BY T1.id ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
List every album's title.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT title FROM albums
What are the titles of all the albums?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT title FROM albums
List every album ordered by album title in ascending order.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT title FROM albums ORDER BY CASE WHEN title IS NULL THEN 1 ELSE 0 END, title
What are the titles of all the albums alphabetically ascending?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT title FROM albums ORDER BY CASE WHEN title IS NULL THEN 1 ELSE 0 END, title
List every album whose title starts with A in alphabetical order.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT title FROM albums WHERE title LIKE 'A%' ORDER BY CASE WHEN title IS NULL THEN 1 ELSE 0 END, title
What are the titles of all albums that start with A in alphabetical order?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT title FROM albums WHERE title LIKE 'A%' ORDER BY CASE WHEN title IS NULL THEN 1 ELSE 0 END, title
List the customers first and last name of 10 least expensive invoices.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 10 T1.first_name, T1.last_name FROM customers AS T1 JOIN invoices AS T2 ON T2.customer_id = T1.id ORDER BY CASE WHEN total IS NULL THEN 1 ELSE 0 END, total
What are the first and last names of the customers with the 10 cheapest invoices?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 10 T1.first_name, T1.last_name FROM customers AS T1 JOIN invoices AS T2 ON T2.customer_id = T1.id ORDER BY CASE WHEN total IS NULL THEN 1 ELSE 0 END, total
List total amount of invoice from Chicago, IL.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT SUM(total) FROM invoices WHERE billing_city = [Chicago] AND billing_state = [IL]
What are the total amount of money in the invoices billed from Chicago, Illinois?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT SUM(total) FROM invoices WHERE billing_city = [Chicago] AND billing_state = [IL]
List the number of invoices from Chicago, IL.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT COUNT_BIG(*) FROM invoices WHERE billing_city = [Chicago] AND billing_state = [IL]
How many invoices were billed from Chicago, IL?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT COUNT_BIG(*) FROM invoices WHERE billing_city = [Chicago] AND billing_state = [IL]
List the number of invoices from the US, grouped by state.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT billing_state, COUNT_BIG(*) FROM invoices WHERE billing_country = [USA] GROUP BY billing_state
How many invoices were billed from each state?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT billing_state, COUNT_BIG(*) FROM invoices WHERE billing_country = [USA] GROUP BY billing_state
List the state in the US with the most invoices.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 1 billing_state, COUNT_BIG(*) FROM invoices WHERE billing_country = [USA] GROUP BY billing_state ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
What are the states with the most invoices?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 1 billing_state, COUNT_BIG(*) FROM invoices WHERE billing_country = [USA] GROUP BY billing_state ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
List the number of invoices and the invoice total from California.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT billing_state, COUNT_BIG(*), SUM(total) FROM invoices WHERE billing_state = [CA]
What is the number of invoices and total money billed in them from CA?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT billing_state, COUNT_BIG(*), SUM(total) FROM invoices WHERE billing_state = [CA]
List Aerosmith's albums.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT T1.title FROM albums AS T1 JOIN artists AS T2 ON T1.artist_id = T2.id WHERE T2.name = [Aerosmith]
What are the titles of all the Aerosmith albums?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT T1.title FROM albums AS T1 JOIN artists AS T2 ON T1.artist_id = T2.id WHERE T2.name = [Aerosmith]
How many albums does Billy Cobham has?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT COUNT_BIG(*) FROM albums AS T1 JOIN artists AS T2 ON T1.artist_id = T2.id WHERE T2.name = [Billy Cobham]
How many albums has Billy Cobam released?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT COUNT_BIG(*) FROM albums AS T1 JOIN artists AS T2 ON T1.artist_id = T2.id WHERE T2.name = [Billy Cobham]
Eduardo Martins is a customer at which company?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT company FROM customers WHERE first_name = [Eduardo] AND last_name = [Martins]
What is the company where Eduardo Martins is a customer?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT company FROM customers WHERE first_name = [Eduardo] AND last_name = [Martins]
What is Astrid Gruber's email and phone number?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT email, phone FROM customers WHERE first_name = [Astrid] AND last_name = [Gruber]
What is the email and phone number of Astrid Gruber the customer?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT email, phone FROM customers WHERE first_name = [Astrid] AND last_name = [Gruber]
How many customers live in Prague city?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT COUNT_BIG(*) FROM customers WHERE city = [Prague]
How many customers live in the city of Prague?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT COUNT_BIG(*) FROM customers WHERE city = [Prague]
How many customers in state of CA?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT COUNT_BIG(*) FROM customers WHERE state = [CA]
How many customers are from California?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT COUNT_BIG(*) FROM customers WHERE state = [CA]
What country does Roberto Almeida live?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT country FROM customers WHERE first_name = [Roberto] AND last_name = [Almeida]
In which country does Roberto Almeida?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT country FROM customers WHERE first_name = [Roberto] AND last_name = [Almeida]
List the name of albums that are released by aritist whose name has 'Led'
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT T2.title FROM artists AS T1 JOIN albums AS T2 ON T1.id = T2.artist_id WHERE T1.name LIKE '%Led%'
What is the title of the album that was released by the artist whose name has the phrase 'Led'?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT T2.title FROM artists AS T1 JOIN albums AS T2 ON T1.id = T2.artist_id WHERE T1.name LIKE '%Led%'
How many customers does Steve Johnson support?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT COUNT_BIG(*) FROM employees AS T1 JOIN customers AS T2 ON T2.support_rep_id = T1.id WHERE T1.first_name = [Steve] AND T1.last_name = [Johnson]
What is the count of customers that Steve Johnson supports?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT COUNT_BIG(*) FROM employees AS T1 JOIN customers AS T2 ON T2.support_rep_id = T1.id WHERE T1.first_name = [Steve] AND T1.last_name = [Johnson]
What is the title, phone and hire date of Nancy Edwards?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT title, phone, hire_date FROM employees WHERE first_name = [Nancy] AND last_name = [Edwards]
What is the title, phone number and hire date for the employee named Nancy Edwards?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT title, phone, hire_date FROM employees WHERE first_name = [Nancy] AND last_name = [Edwards]
find the full name of employees who report to Nancy Edwards?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT T2.first_name, T2.last_name FROM employees AS T1 JOIN employees AS T2 ON T1.id = T2.reports_to WHERE T1.first_name = [Nancy] AND T1.last_name = [Edwards]
What is the first and last name of the employee who reports to Nancy Edwards?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT T2.first_name, T2.last_name FROM employees AS T1 JOIN employees AS T2 ON T1.id = T2.reports_to WHERE T1.first_name = [Nancy] AND T1.last_name = [Edwards]
What is the address of employee Nancy Edwards?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT address FROM employees WHERE first_name = [Nancy] AND last_name = [Edwards]
What is Nancy Edwards's address?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT address FROM employees WHERE first_name = [Nancy] AND last_name = [Edwards]
Find the full name of employee who supported the most number of customers.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 1 T1.first_name, T1.last_name FROM employees AS T1 JOIN customers AS T2 ON T1.id = T2.support_rep_id GROUP BY T1.id ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
What is the full name of the employee who has the most customers?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 1 T1.first_name, T1.last_name FROM employees AS T1 JOIN customers AS T2 ON T1.id = T2.support_rep_id GROUP BY T1.id ORDER BY CASE WHEN COUNT_BIG(*) IS NULL THEN 1 ELSE 0 END DESC, COUNT_BIG(*) DESC
How many employees are living in Canada?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT COUNT_BIG(*) FROM employees WHERE country = [Canada]
How many employees live in Canada?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT COUNT_BIG(*) FROM employees WHERE country = [Canada]
What is employee Nancy Edwards's phone number?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT phone FROM employees WHERE first_name = [Nancy] AND last_name = [Edwards]
What is the the phone number of Nancy Edwards?
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT phone FROM employees WHERE first_name = [Nancy] AND last_name = [Edwards]
Who is the youngest employee in the company? List employee's first and last name.
-- Tables de la base de données (T-SQL) -- TABLE [artists] ( [id] NVARCHAR(MAX), [name] NVARCHAR(MAX) ); TABLE [albums] ( [id] INT, [title] NVARCHAR(MAX), [artist id] INT ); TABLE [employees] ( [id] INT, [last name] NVARCHAR(MAX), [first name] NVARCHAR(MAX), [title] NVARCHAR(MAX), ...
SELECT TOP 1 first_name, last_name FROM employees ORDER BY CASE WHEN birth_date IS NULL THEN 1 ELSE 0 END DESC, birth_date DESC