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
year(answer_date) = 2021 and month(answer_date) = 11
group by
1
order by
1
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