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(*) user_num,
round(avg(active_days_within_30), 1) avg_active_day,
round(avg(question_cnt), 1) avg_question_cnt
from user_profile
group by
gender, university
order by gender, university