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`,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 order by gender,university
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