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) user_num, AVG(active_days_within_30) avg_active_day, AVG(question_cnt) avg_question_cnt FROM user_profile GROUP BY university,gender;
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