题解 | #各个视频的平均完播率#
各个视频的平均完播率
https://www.nowcoder.com/practice/96263162f69a48df9d84a93c71045753
select video_id,round(count(if(timestampdiff(second,start_time,end_time) >= duration,1,null)) / count(*),3)avg_comp_play_rate from tb_video_info tvi left join tb_user_video_log tuvl using(video_id) inner join ( select distinct video_id from tb_user_video_log ) A using (video_id) where year(start_time) = 2021 group by video_id order by avg_comp_play_rate desc;
#MySQL#
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