select tag, concat( round( avg(case when timestampdiff(second, start_time, end_time) >= duration then 1 else timestampdiff(second, start_time, end_time) / duration end) * 100, 2 ), '%' ) as avg_play_progress from tb_user_video_log uvl left outer join tb_video_info vi on uvl.video_id = vi.video_i...