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 where month(answer_date) =11 group by answer_date order by answer_date
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