sqlzoo练习答案--More JOIN operations

Movie Database

This tutorial introduces the notion of a join. The database consists of three tables movie , actor and casting .

movie	actor	casting
id	id	movieid
title	name	actorid
yr		ord
director
budget
gross

1、 List the films where the  yr  is 1962 [Show  id ,  title ]

SELECT id, title
 FROM movie
 WHERE yr=1962

2、 Give year of 'Citizen Kane'.

select yr from movie where title='Citizen Kane'

3、 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

4、 What are the titles of the films with  id  11768, 11955, 21191

select title from movie where id in (11768,11955,21191)

5、 What  id  number does the actress 'Glenn Close' have?

select id from actor where name='Glenn Close'

6、 What is the  id  of the film 'Casablanca'

select id from movie where title='Casablanca'

7、

Obtain the cast list for 'Casablanca'.

what is a cast list?

The cast list is the names of the actors who were in the movie.

Use movieid=11768, this is the value that you obtained in the previous question.

select name from actor inner join casting on actor.id=casting.actorid and movieid=11768

8、 Obtain the cast list for the film 'Alien'

select name from actor inner join movie on title='Alien' inner join casting on actor.id=casting.actorid and movie.id=casting.movieid

9、 List the films in which 'Harrison Ford' has appeared

select title from movie inner join actor on name='Harrison Ford' inner join casting on movie.id=casting.movieid and actor.id=casting.actorid

10、 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 inner join actor on name='Harrison Ford' inner join casting on movie.id=casting.movieid and actor.id=casting.actorid and ord!=1

11、 List the films together with the leading star for all 1962 films.

select movie.title,actor.name from movie inner join actor on yr=1962 inner join casting on movie.id=casting.movieid and actor.id=casting.actorid and ord=1

12、 Which were the busiest years for 'John Travolta', 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='John Travolta'
GROUP BY yr
HAVING COUNT(title)=(SELECT MAX(c) FROM
(SELECT yr,COUNT(title) AS c FROM
   movie JOIN casting ON movie.id=movieid
         JOIN actor   ON actorid=actor.id
 WHERE name='John Travolta'
 GROUP BY yr) AS t
)

13、 List the film title and the leading actor for all of the films 'Julie Andrews' played in.

SELECT DISTINCT(title),name FROM movie inner join casting on movie.id=movieid
inner join actor on actorid=actor.id and ord=1
WHERE movieid IN (
  SELECT t2.movieid FROM actor t1 inner join casting t2 on t2.actorid=t1.id and name='Julie Andrews')

14、 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

15、 List the films released in the year 1978 ordered by the number of actors in the cast.

select title,count(actorid) from movie inner join casting on movie.id=movieid and yr=1978 group by title order by 2 desc

16、 List all the people who have worked with 'Art Garfunkel'.

select name from actor inner join casting on actor.id=casting.actorid and casting.movieid in (select movieid from actor inner join casting on actor.id=casting.actorid and name='Art Garfunkel') and name!='Art Garfunkel'