题解 | #获得积分最多的人(三)#
获得积分最多的人(三)
http://www.nowcoder.com/practice/d2b7e2a305a7499fb310dc82a43820e8
with t1 as (
select user_id,case when type='reduce' then -grade_num
else grade_num
end as grade_num
from grade_info
),
total as(
select a.id,name,sum(grade_num) over(partition by name)as grade_sum
from user a
left join t1 b
on a.id=b.user_id
order by grade_sum desc
)
select id,name,grade_sum
from total
where grade_sum in(
select max(grade_sum)
from total
)
group by id
order by id 
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