题解 | #各个视频的平均完播率#

with f as (select tvi.video_id
                , if(timestampdiff(second, tuvl.start_time, tuvl.end_time) >= tvi.duration, 1, 0) as play
           from tb_user_video_log tuvl
                    inner join tb_video_info tvi using (video_id)
           where year(tuvl.start_time) = '2021')
select video_id
     , round(sum(play) / count(play), 3) as avg_comp_play_rate
from f
group by video_id
order by avg_comp_play_rate desc;