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
http://www.nowcoder.com/practice/d1f5a1e50d0b49f3a39eb01c4fdb621f
select answer_date,round(count(issue_id)/count(distinct author_id),2)
from answer_tb
where month(answer_date)=11
group by answer_date
order by answer_date;
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