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