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