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,
round(AVG(active_days_within_30),1) as avg_active_day,
round(AVG(question_cnt),1) as avg_question_cnt
FROM user_profile
GROUP BY gender,university
