题解 | #查找描述信息中包含robot的电影对应的分类名称以及电影数目，而且还需要该分类对应电影数量>=5部#

 select c.name,count(f.film_id) as count from film f
 left join film_category fc ON f.film_id=fc.film_id
 left join category c ON fc.category_id=c.category_id
 inner join (select category_id,count(*) as count from film_category group by category_id having count>=5) fc2
 on fc2.category_id=fc.category_id
 where f.description like '%robot%'
 group by c.name