高频 SQL 50 题（基础版）_1341. 电影评分

思路

(select Users.name results
from Users
left join MovieRating on Users.user_id = MovieRating.user_id
group by(Users.name)
order by count(MovieRating.movie_id) desc,Users.name asc
limit 1)
union all
(select m.title results
from MovieRating r
join Movies m on r.movie_id=m.movie_id
where date_format(created_at,"%Y-%m")='2020-02'
group by m.title
order by avg(r.rating) desc,m.title asc limit 1)