SQL - 如何按上次输入的值删除重复的行？

Question

我从这个链接有这个代码:如何删除重复的行？

 ;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它删除随机重复.

如果不可能,我怎样才能删除更高时间的重复项？

Answer 1

加 order by hours desc

;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