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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