题解 | #某乎问答11月份日人均回答量#
某乎问答11月份日人均回答量
https://www.nowcoder.com/practice/d1f5a1e50d0b49f3a39eb01c4fdb621f
SELECT answer_date,
ROUND(COUNT(issue_id)/COUNT(DISTINCT author_id),2) AS per_num
FROM answer_tb
GROUP BY answer_date
ORDER BY answer_date;
就算你真拿到牛友也会为你开心的