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
u.video_id,
round(SUM(CASE WHEN timestampdiff(second, u.start_time, u.end_time) >= v.duration THEN 1 ELSE 0 END) / count(*), 3) as avg_comp_play_rate
from tb_user_video_log u
join tb_video_info v
using (video_id)
where year(start_time) = 2021
group by video_id
order by avg_comp_play_rate desc
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