题解 | #使用子查询的方式找出属于Action分类的所有电影对应的title,description#
使用子查询的方式找出属于Action分类的所有电影对应的title,description
http://www.nowcoder.com/practice/2f2e556d335d469f96b91b212c4c203e
1.分析
子查询关键是建立好表与表之间的联系，
where和子查询对等。
2.代码
# SELECT f.title, f.description
# FROM film AS f, category AS c, film_category AS fc
# WHERE f.film_id = fc.film_id
# and c.category_id = fc.category_id
# and c.name = "Action"
SELECT f.title, f.description
FROM film AS f
WHERE f.film_id in (select fc.film_id from film_category as fc
where fc.category_id in(select c.category_id from category as c
where c.name = "Action"))
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