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