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
https://www.nowcoder.com/practice/8e33da493a704d3da15432e4a0b61bb3
select
date (in_time) as dt,
round(
sum(timestampdiff (second, in_time, out_time)) / count(distinct uid),
1
) as avg_view_len_sec
from
tb_user_log
where
year (in_time) = 2021
and month (in_time) = 11
and artical_id != 0
group by
date (in_time)
order by
avg_view_len_sec
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