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 uvl.video_id, round( sum(case when (end_time - start_time) >= duration then 1 else 0 end) / count(uvl.video_id), 3 ) as avg_comp_play_rate from tb_user_video_log uvl left outer join tb_video_info vi on uvl.video_id = vi.video_id where year(end_time) = 2021 group by uvl.video_id order by avg_comp_play_rate desc;
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