题解 | 输出播放量最高的视频
输出播放量最高的视频
https://www.nowcoder.com/practice/9e9cb264e1f64e28846975d5a32ba8e4
select cid,round(cast(max(nums) as float),3) as max_peak_uv from( select t1.id,t1.cid,count(*) as nums from play_record_tb t1 join play_record_tb t2 on t1.cid=t2.cid and (t1.start_time between t2.start_time and t2.end_time) #自连接 group by t1.id,t1.cid ) t3 group by cid order by max_peak_uv desc limit 3
