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