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(level) as level_cnt from exam_record left join user_info using(uid) left join examination_info using(exam_id) where score > 80 and tag = 'SQL' group by level order by level_cnt desc
