mysql学习07--更多join查询

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

movie

id

title

yr

director

budget

gross

actor

id

name

casting

movieid

actorid

ord

此教程練習表格合拼。數據庫有三個表格
movie電影(id編號, title電影名稱, yr首影年份, director導演, budget製作費, gross票房收入)
actor演員(id編號, name姓名)
casting角色(movieid電影編號, actorid演員編號, ord角色次序)
角色次序代表第1主角是1, 第2主角是2...如此類推.

1.列出1962年首影的電影， [顯示 id, title]

SELECT id, title
 FROM movie
 WHERE yr=1962

2.電影大國民 'Citizen Kane' 的首影年份。

select yr from movie where title='Citizen Kane'

3.列出全部Star Trek星空奇遇記系列的電影，包括id, title 和 yr(此系統電影都以Star Trek為電影名稱的開首)。按年份順序排列。

select id,title,yr
from movie
where title like 'Star Trek%'
order by yr

4.id是 11768, 11955, 21191 的電影是什麼名稱?

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

5.女演員'Glenn Close'的編號 id是什麼?

select id
from actor
where name='Glenn Close'

6.電影北非諜影'Casablanca' 的編號 id是什麼?

select id
from movie
where title='Casablanca'

7.列出電影北非諜影 'Casablanca'的演員名單。使用 movieid=11768, 這是你上一題得到的結果。

select name
from actor a join casting c on a.id=c.actorid
join movie m on c.movieid=m.id
where movieid=11768

8.顯示電影異型'Alien' 的演員清單。

select name
from actor a join casting c on a.id=c.actorid
join movie m on c.movieid=m.id
where title='Alien'

9.列出演員夏里遜福 'Harrison Ford' 曾演出的電影。

select title
from actor a join casting c on a.id=c.actorid
join movie m on c.movieid=m.id
where a.name='Harrison Ford'

10.列出演員夏里遜福 'Harrison Ford' 曾演出的電影，但他不是第1主角。

select title
from actor a join casting c on a.id=c.actorid
join movie m on c.movieid=m.id
where a.name='Harrison Ford' and c.ord!=1

11.列出1962年首影的電影及它的第1主角。

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

12.尊·特拉華達'John Travolta'最忙是哪一年? 顯示年份和該年的電影數目。

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.列出演員茱莉·安德絲'Julie Andrews'曾參與的電影名稱及其第1主角。

select title,name
from actor a join casting c on a.id=c.actorid
join movie m on c.movieid=m.id
where m.id in(
SELECT movieid FROM casting
WHERE actorid IN (
  SELECT id FROM actor
  WHERE name='Julie Andrews'))
and c.ord=1

14.列出按字母順序，列出哪一演員曾作30次第1主角。

select a.name
from actor a join casting c on a.id=c.actorid
where ord=1
group by a.name
having count(*) >= 30

15.列出1978年首影的電影名稱及角色數目，按此數目由多至少排列。

select title,count(actorid)
from movie m join casting c
on m.id=c.movieid
where m.id in(
select id
from movie
where yr=1978)
group by title
order by count(actorid) desc

本题提示：Some of the data is incorrect.

16.列出曾與演員亞特·葛芬柯'Art Garfunkel'合作過的演員姓名。

select a.name
from actor a join casting c on a.id=c.actorid
join movie m on c.movieid=m.id
where m.id in(
select m.id
from actor a join casting c on a.id=c.actorid
join movie m on c.movieid=m.id
where a.name='Art Garfunkel')
and a.name!='Art Garfunkel'

题目来源：SQLZOO