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
ORDER BY gender,university
