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_viiew_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_viiew_len_sec asc
查看15道真题和解析
，感觉有些诈骗短信就这么发的