题解 | #2021年11月每天的人均浏览文章时长#
2021年11月每天的人均浏览文章时长
http://www.nowcoder.com/practice/8e33da493a704d3da15432e4a0b61bb3
select
date(in_time) dt,
round(
sum(timestampdiff(second, in_time, out_time)) / count(distinct uid),
1
) avg_viiew_len_sec
from
tb_user_log
where
year(in_time)=2021
and month(in_time)=11
and artical_id != 0
group by
dt
order by
avg_viiew_len_sec
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