简介
select user.id, user.name,t.grade_sum
from (
select user_id,sum(grade_num) as grade_sum
from grade_info group by user_id
having grade_sum =
( select sum(grade_num) as grade_sum from grade_info
group by user_id order by grade_sum desc limit 1)
) t
inner join user
on t.user_id=user.id
order by user.id