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 level
, count(1) level_cnt
from exam_record er
inner join examination_info ei on er.exam_id = ei.exam_id
inner join user_info ui on er.uid = ui.uid
where ei.tag = 'SQL'
and er.score > 80
group by level
order by level_cnt desc ;
