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 t1.level, count(t1.uid) as level_cnt from user_info t1, examination_info t2, exam_record t3 where t1.uid = t3.uid and t2.exam_id = t3.exam_id and t2.tag = 'SQL' and t3.score > 80 group by t1.level order by level_cnt desc