More JOIN operations
|Language:||English • 日本語 • 中文|
This tutorial introduces the notion of a join. The database
consists of three tables
- 1 1962 movies
- 2 When was Citizen Kane released?
- 3 Star Trek movies
- 4 id for actor Glenn Close
- 5 id for Casablanca
- 6 Cast list for Casablanca
- 7 Alien cast list
- 8 Harrison Ford movies
- 9 Harrison Ford as a supporting actor
- 10 Lead actors in 1962 movies
- 11 Busy years for Rock Hudson
- 12 Lead actor in Julie Andrews movies
- 13 Actors with 30 leading roles
List the films where the yr is 1962 [Show id, title]
SELECT id, title FROM movie WHERE yr=1962
SELECT id, title FROM movie WHERE yr=1962
When was Citizen Kane released?
Give year of 'Citizen Kane'.
SELECT yr FROM movie WHERE title='Citizen Kane'
Star Trek movies
List all of the Star Trek movies, include the id, title and yr (all of these movies include the words Star Trek in the title). Order results by year.
SELECT id,title, yr FROM movie WHERE title LIKE 'Star Trek%' ORDER BY yr
id for actor Glenn Close
What id number does the actor 'Glenn Close' have?
SELECT id FROM actor WHERE name= 'Glenn Close'
id for Casablanca
What is the id of the film 'Casablanca'
SELECT id FROM movie WHERE title='Casablanca'
Cast list for Casablanca
Obtain the cast list for 'Casablanca'.
The cast list is the names of the actors who were in the movie.
Use movieid=11768, (or whatever value you got from the previous question)
SELECT name FROM casting, actor WHERE movieid=(SELECT id FROM movie WHERE title='Casablanca') AND actorid=actor.id
Alien cast list
Obtain the cast list for the film 'Alien'
SELECT name FROM movie, casting, actor WHERE title='Alien' AND movieid=movie.id AND actorid=actor.id
Harrison Ford movies
List the films in which 'Harrison Ford' has appeared
SELECT title FROM movie, casting, actor WHERE name='Harrison Ford' AND movieid=movie.id AND actorid=actor.id
Harrison Ford as a supporting actor
List the films where 'Harrison Ford' has appeared - but not in the starring role. [Note: the ord field of casting gives the position of the actor. If ord=1 then this actor is in the starring role]
SELECT title FROM movie, casting, actor WHERE name='Harrison Ford' AND movieid=movie.id AND actorid=actor.id AND ord<>1
Lead actors in 1962 movies
List the films together with the leading star for all 1962 films.
SELECT title, name FROM movie, casting, actor WHERE yr=1962 AND movieid=movie.id AND actorid=actor.id AND ord=1
Busy years for Rock Hudson
Which were the busiest years for 'Rock Hudson', show the year and the number of movies he made each year for any year in which he made more than 2 movies.
SELECT yr,COUNT(title) FROM movie JOIN casting ON movie.id=movieid JOIN actor ON actorid=actor.id WHERE name='Doris Day' GROUP BY yr HAVING COUNT(title) > 1
SELECT yr,COUNT(title) FROM movie JOIN casting ON movie.id=movieid JOIN actor ON actorid=actor.id where name='Rock Hudson' GROUP BY yr HAVING COUNT(title) > 2
Lead actor in Julie Andrews movies
List the film title and the leading actor for all of the films 'Julie Andrews' played in.
Julie Andrews starred in the 1980 remake of Little Miss Marker and not the original(1934).
Title is not a unique field, create a table of IDs in your subquery
SELECT movieid FROM casting WHERE actorid IN ( SELECT id FROM actor WHERE name='Julie Andrews')
SELECT title, name FROM movie, casting, actor WHERE movieid=movie.id AND actorid=actor.id AND ord=1 AND movieid IN (SELECT movieid FROM casting, actor WHERE actorid=actor.id AND name='Julie Andrews')
Actors with 30 leading roles
Obtain a list, in alphabetical order, of actors who've had at least 30 starring roles.
SELECT name FROM casting JOIN actor ON actorid = actor.id WHERE ord=1 GROUP BY name HAVING COUNT(movieid)>=30
List the films released in the year 1978 ordered by the number of actors in the cast, then by title.
SELECT title, COUNT(actorid) FROM casting,movie WHERE yr=1978 AND movieid=movie.id GROUP BY title ORDER BY 2 DESC,1 ASC
List all the people who have worked with 'Art Garfunkel'.
SELECT DISTINCT d.name FROM actor d JOIN casting a ON (a.actorid=d.id) JOIN casting b on (a.movieid=b.movieid) JOIN actor c on (b.actorid=c.id and c.name='Art Garfunkel') WHERE d.id!=c.id