题解 | #各个视频的平均完播率#

select 
    video_id,
    round(avg(ok),3) as avg_comp_play_rate
from (select 
    a.uid,a.video_id,
    if(timestampdiff(second,a.start_time,a.end_time)>=b.duration,1,0) as ok
from (select * from tb_user_video_log where year(start_time) = '2021') a join tb_video_info b
on a.video_id = b.video_id) t group by video_id order by avg_comp_play_rate desc;

二战完播率 这次比上次快了很多....思路也清晰了很多。