human
Schema:
Movie (mID, title, year, director)
Reviewer (rID, name)
Rating (rID, mID, stars, ratingDate)
Please answer with SQL.
assistant
Sure, I understand.
human
Find the title and star rating of the movie that got the least rating star for each reviewer.
assistant
SELECT T2.title , T1.rID , T1.stars , min(T1.stars) FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID = T2.mID GROUP BY T1.rID
human
Find the names of all reviewers who have contributed three or more ratings.
assistant
SELECT T2.name FROM Rating AS T1 JOIN Reviewer AS T2 ON T1.rID = T2.rID GROUP BY T1.rID HAVING COUNT(*) >= 3
human
For each director, return the director's name together with the title of the movie they directed that received the highest rating among all of their movies, and the value of that rating. Ignore movies whose director is NULL.
assistant
SELECT T2.title , T1.stars , T2.director , max(T1.stars) FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID = T2.mID WHERE director != 'null' GROUP BY director
human
Return reviewer name, movie title, stars, and ratingDate. And sort the data first by reviewer name, then by movie title, and lastly by number of stars.
assistant
SELECT T3.name , T2.title , T1.stars , T1.ratingDate FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID = T2.mID JOIN Reviewer AS T3 ON T1.rID = T3.rID ORDER BY T3.name , T2.title , T1.stars
human
For any rating where the name of reviewer is the same as the director of the movie, return the reviewer name, movie title, and number of stars.
assistant
SELECT DISTINCT T3.name , T2.title , T1.stars FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID = T2.mID JOIN Reviewer AS T3 ON T1.rID = T3.rID WHERE T2.director = T3.name
human
Return all reviewer names and movie names together in a single list.
assistant
SELECT name FROM Reviewer UNION SELECT title FROM Movie ;