39 - 电影评分
(selectu.name as results
fromMovieRating m left join Users u on m.user_id=u.user_id
GROUP BYm.user_id
order by count(*) desc,u.name asc limit 1)
union all
(selectm1.title as results
fromMovieRating m left join Movies m1 on m.movie_id=m1.movie_id
wheremonth(m.created_at)=2
group bym.movie_id
order by avg(m.rating) desc,m1.title asc
limit 1);
)
)
