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(id) user_num,avg(active_days_within_30) avg_active_day,avg(question_cnt)avg_question_cnt from user_profile group by gender,university //考察点在按照性别和学校分组,本题无其他约束条件