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) as user_num, AVG(active_days_within_30) as avg_active_day, AVG(question_cnt) as avg_question_cnt
from user_profile
group by university,gender;
from user_profile
group by university,gender;
