题解 | 被重复观看次数最多的3个视频
被重复观看次数最多的3个视频
https://www.nowcoder.com/practice/b75fa2412659422c96369976ee1f9504
select
pt.cid cid
,CAST(count(*) as DECIMAL(10,3)) pv
,row_number()over(order by count(*) desc, release_date desc) rk
from play_record_tb pt
left join course_info_tb ct
on pt.cid = ct.cid
group by uid, pt.cid, release_date
having count(*) > 1
limit 3

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