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) dt, round(sum(time_to_sec(timediff(out_time,in_time)))/count(DISTINCT uid),1) AS avg_viiew_len_sec FROM tb_user_log WHERE substr(date(in_time),1,7) = '2021-11' AND artical_id <> 0 GROUP BY dt ORDER BY avg_viiew_len_sec;
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