题解 | #作答试卷得分大于过80的人的用户等级分布#
作答试卷得分大于过80的人的用户等级分布
https://www.nowcoder.com/practice/5bc77e3a3c374ad6a92798f0ead4c744
select
t.level level,
count(*) level_cnt
from
(
select
ui.uid uid,
ui.level level
from
exam_record er
left join examination_info ei on er.exam_id = ei.exam_id
left join user_info ui on er.uid = ui.uid
where
ei.tag = 'SQL'
and score > 80
) as t group by t.level order by level_cnt desc
