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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