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,
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;
