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(device_id )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;

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