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 u.level, count(u.level) level_cnt
FROM exam_record r
RIGHT JOIN examination_info i
ON r.exam_id = i.exam_id
RIGHT JOIN user_info u
ON u.uid = r.uid
WHERE r.score in (
SELECT r.score
FROM exam_record r
RIGHT JOIN examination_info i
ON i.exam_id = r.exam_id
WHERE i.tag = 'SQL'
AND r.score > 80
)
GROUP BY u.level
ORDER BY level_cnt DESC;
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