题解 | #查找后降序排列#
分组计算练习题
http://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;
