如何使用 SQL 从 Sakila 数据库中获得所需的结果

Question

我需要：找出演员总数高于平均水平的电影。返回按标题排序的电影名称及其演员人数。重要说明：此查询应返回许多电影。仅显示前 10 个结果。

我为此使用 mySQL 工作台，并在 Sakila 数据库上执行查询。

[附图]

到目前为止我的代码是：

SELECT film.title, COUNT(film_actor.actor_id) AS actor_count
FROM film_actor
INNER JOIN film ON film_actor.film_id=film.film_id
GROUP BY film.film_id
HAVING COUNT(film_actor.actor_id) >
AVG(film_actor.actor_id)
ORDER BY film.title

Answer 1

with cte as(
SELECT film.film_id,film.title, COUNT(film_actor.actor_id) AS actor_count
FROM film_actor
INNER JOIN film ON film_actor.film_id=film.film_id
GROUP BY film.film_id,film.title
)
select cte.title,cte.actor_count from 
cte where cte.actor_count>(select avg(actor_count) from cte)
order by cte.title limit 0,10