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,round(avg(active_days_within_30) ,1)as avg_active_day,round(avg(question_cnt),1) as avg_question_cnt from user_profile group by gender,university group by +所有非聚合列
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