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_format (in_time, "%Y-%m-%d") as dt,
round(
sum(timestampdiff (second, in_time, out_time)) / COUNT(distinct uid), 1) as avg_viiew_len_sec
from
tb_user_log
where
date_format (in_time, "%Y-%m") = '2021-11'
and artical_id != 0
group by
dt
order by
avg_viiew_len_sec;
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