SQL – 如何按上次输入的值删除重复的行？

我从这个链接有这个代码： How can I remove duplicate rows?

;WITH cte
 AS (SELECT ROW_NUMBER() OVER (PARTITION BY person_id,date_work,hours
                                   ORDER BY ( SELECT 0)) RN
     FROM   work_hours)
 DELETE FROM cte
 WHERE  RN > 1

是否可以删除第一个输入的重复行或者我应该有一个额外的列date_of_entry？我想这样做,如果我输入相同的date_work和不同的小时PARTITION BY person_id,date_work它会随机删除重复.

如果不可能,我如何删除更高时间的重复项？

解决方法

按小时desc添加订单

;WITH cte
 AS (SELECT ROW_NUMBER() OVER (PARTITION BY person_id,date_work
                                   ORDER BY hours DESC) RN
     FROM   work_hours)
 DELETE FROM cte
 WHERE  RN > 1

原文地址：https://www.jb51.cc/mssql/77150.html