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; 关键词：as,count,round,group by.
