题解 | #各个视频的平均完播率#
各个视频的平均完播率
http://www.nowcoder.com/practice/96263162f69a48df9d84a93c71045753
select video_id,
round(sum(case when timestampdiff(second,start_time,end_time)>=duration then 1 else 0 end)/count(start_time),3)
as avg_comp_play_rate
from tb_user_video_log
left join
tb_video_info
using(video_id)
where year(start_time)=2021
group by video_id
order by avg_comp_play_rate desc
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