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 asc;
