学习原网址：JOIN Quiz 2
1. Select the statement which lists the unfortunate directors of the movies which have caused financial loses (gross < budget)
SELECT name
FROM actor INNER JOIN movie ON actor.id = director
WHERE gross < budget
2. Select the correct example of JOINing three tables
SELECT *
FROM actor JOIN casting ON actor.id = actorid
JOIN movie ON movie.id = movieid
3. Select the statement that shows the list of actors called ‘John’ by order of number of movies in which they acted
SELECT name, COUNT(movieid)
FROM casting JOIN actor ON actorid=actor.id
WHERE name LIKE 'John %'
GROUP BY name ORDER BY 2 DESC
4. Select the result that would be obtained from the following code:
SELECT title
FROM movie JOIN casting ON (movieid=movie.id)
JOIN actor ON (actorid=actor.id)
WHERE name='Paul Hogan' AND ord = 1
5. Select the statement that lists all the actors that starred in movies directed by Ridley Scott who has id 351
SELECT name
FROM movie JOIN casting ON movie.id = movieid
JOIN actor ON actor.id = actorid
WHERE ord = 1 AND director = 351
6. There are two sensible ways to connect movie and actor. They are:
link the director column in movies with the primary key in actor
connect the primary keys of movie and actor via the casting table
7. Select the result that would be obtained from the following code:
SELECT title, yr
FROM movie, casting, actor
WHERE name='Robert De Niro' AND movieid=movie.id AND actorid=actor.id AND ord = 3
