题解 | #分组计算练习题#
分组计算练习题
https://www.nowcoder.com/practice/009d8067d2df47fea429afe2e7b9de45
SELECT gender,
university,
COUNT(gender) AS user_num,
AVG(active_days_within_30) AS avg_active_day,
AVG(question_cnt) AS avg_question_cnt
FROM user_profile
GROUP BY university, gender
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