题解 | 各个视频的平均完播率
select a.video_id,round(sum(if(a.end_time-a.start_time>=duration,1,0))/count(start_time),3) as avg_comp_play_rate from tb_user_video_log a left join tb_video_info b on a.video_id=b.video_id WHERE YEAR(start_time)=2021 group by a.video_id order by avg_comp_play_rate desc
需要记住的是完播率= sum((end_time-start_time>=duration,1,0))/count(start_time)