如何在SQL Server中爲行分區設置分區ID /名稱？

Question

如何在SQL Server中爲行分區設置分區ID /名稱？

name surname val 
a b  10 
c d  2 
a b  11 
a b  13 

結果（按姓名分區）：

name surname val rowno partitionid 

a b  10 1 1 
a b  11 2 1 
a b  13 3 1 
c d  2 1 2 

Answer 1

DECLARE @table TABLE(name CHAR(1) , surname CHAR(1) , val TINYINT) 

INSERT INTO @table 
VALUES ('a' , 'b' , 10) 
, ('c' , 'd' , 2) 
, ('a' , 'b' , 11) 
, ('a' , 'b' , 13) 

SELECT * FROM @table 

SELECT * 
, ROW_NUMBER() OVER (PARTITION BY name, surname ORDER BY val) as rowno 
, DENSE_RANK() OVER (ORDER BY name) as partitionid 
FROM @table 

商祺！

Answer 2

的dense_rank窗函數似乎符合該法案：

SELECT *, 
     DENSE_RANK() OVER (PARTITION BY name, surname ORDER BY val) AS rowno, 
     DENSE_RANK() OVER (ORDER BY name, surname) AS partitionid 
FROM mytable