sqlzoo more join 题目及答案

最新推荐文章于 2022-07-30 20:22:46 发布

原创最新推荐文章于 2022-07-30 20:22:46 发布 · 493 阅读

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#mysql #sql #数据库

博客围绕电影数据展开一系列SQL查询，包括查询特定年份电影、演员ID、电影的演员列表等，还涉及按条件筛选和排序，如按年份、演员数量等，使用的数据库相关技术为MySQL和SQL。

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

SELECT id, title
 FROM movie
 WHERE yr=1962

Give year of ‘Citizen Kane’.

select yr
from movie
where title = 'Citizen Kane'

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

What id number does the actor ‘Glenn Close’ have?

select id
from actor
where name = 'Glenn Close'

What is the id of the film ‘Casablanca’

select id
from movie
where title = 'Casablanca'

Obtain the cast list for ‘Casablanca’.

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

Obtain the cast list for the film ‘Alien’

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

List the films in which ‘Harrison Ford’ has appeared

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

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

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

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

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='Rock Hudson'
GROUP BY yr
HAVING COUNT(title) > 2

List the film title and the leading actor for all of the films ‘Julie Andrews’ played in.

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

Obtain a list, in alphabetical order, of actors who’ve had at least 15 starring roles.

select name 
from actor
where id in (
	select actorid
	from casting
	where ord = 1
	group by actorid
	having count(*) >= 15
)
order by name

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

List all the people who have worked with ‘Art Garfunkel’.

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