[英]Row_number & Partition By in SQL Server
I am stuck with the row number over one column group by another column. 我被一个列组的另一列的行号所困扰。
This is my data set 这是我的数据集
PR_Cmd PR_Expd
--------------------------
CVP909104 LVP1ET03904305
CVP909105 LVP1ET03904306
CVP909105 LVP1ET03904306
CVP909105 LVP1ET03904306
CVP909105 LVP1ET03904306
CVP909105 LVP1ET03904306
CVP909105 LVP1ET03904307
CVP909106 LVP1ET03904308
What I want to get : 我想要得到的是:
PR_Cmd PR_Expd Expd_Number
-------------------------------------------
CVP909104 LVP1ET03904305 1
CVP909105 LVP1ET03904306 1
CVP909105 LVP1ET03904306 1
CVP909105 LVP1ET03904306 2
CVP909105 LVP1ET03904307 3
CVP909106 LVP1ET03904308 1
What you seem to want is dense_rank()
. 您似乎想要的是
dense_rank()
。
dense_rank() over (partition by pr_cmd order by pr_expd)
This will restart the numbering for each value of pr_cmd
. 这将重新为
pr_cmd
每个值编号。
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