透視/逆透視多列

Question

如何獲得數據：

OrderID | Ver | Res | OI | Ret | Corp 
----------------------------------------------- 
     1 | 'BUD' | 57823 | 11111 | 34304 | 12344 
     2 | 'ACT' | 12345 | 23456 | 45678 | NULL 

要

Ver1 | Res1 | OI1 | Ret1 | Corp1 | Ver2 | Res2 | OI2 | Ret2 | Corp2 
----------------------------------------------------------------------------- 
'BUD' | 57823 | 11111 | 34304 | 12344 | 'ACT' | 12345 | 23456 | 45678 | NULL 

難道我使用多個支點？！？！

Answer 1

Without pivot it can be done by using this code : 

SELECT 
MAX(CASE WHEN ORDERID=1 THEN VER END) VER1, 
MAX(CASE WHEN ORDERID=1 THEN RES END) RES1, 
MAX(CASE WHEN ORDERID=1 THEN OI END) OI1, 
MAX(CASE WHEN ORDERID=1 THEN RET END)RET1, 
MAX(CASE WHEN ORDERID=1 THEN CORP END) CORP1, 

MAX(CASE WHEN ORDERID=2 THEN VER END)VER2, 
MAX(CASE WHEN ORDERID=2 THEN RES END) RES2, 
MAX(CASE WHEN ORDERID=2 THEN OI END) OI2, 
MAX(CASE WHEN ORDERID=2 THEN RET END)RET2, 
MAX(CASE WHEN ORDERID=2 THEN CORP END) CORP2 

FROM yourtable 

Answer 2

以下查詢將適用於任意數量的行。

DECLARE @SQL NVARCHAR(MAX) 
WITH CTE 
AS 
(
SELECT 1 AS REF,Q,CONCAT(ITEM,ORDERID) AS COL FROM(
SELECT CAST(ORDERID AS VARCHAR(100)) AS ORDERID, 
CAST(VER AS VARCHAR(100)) AS VER, 
CAST(RES AS VARCHAR(100)) AS RES, 
CAST(OI AS VARCHAR(100)) AS OI, 
CAST(RET AS VARCHAR(100)) AS RET, 
CAST(CORP AS VARCHAR(100)) AS CORP FROM ORDERS) K 
UNPIVOT 
(Q FOR ITEM IN (VER,RES,[OI],RET,CORP)) UP 
) 

SELECT @SQL = N'WITH CTE 
AS 
(
SELECT 1 AS REF,Q,CONCAT(ITEM,ORDERID) AS COL FROM(
SELECT CAST(ORDERID AS VARCHAR(100)) AS ORDERID, 
CAST(VER AS VARCHAR(100)) AS VER, 
CAST(RES AS VARCHAR(100)) AS RES, 
CAST(OI AS VARCHAR(100)) AS OI, 
CAST(RET AS VARCHAR(100)) AS RET, 
CAST(CORP AS VARCHAR(100)) AS CORP FROM ORDERS) K 
UNPIVOT 
(Q FOR ITEM IN (VER,RES,[OI],RET,CORP)) UP 
) 
SELECT * FROM CTE 
PIVOT 
(MAX(Q) FOR COL IN ('+ STUFF((SELECT ','+COL FROM CTE FOR XML PATH('')),1,1,'') +')) P' 

EXEC SP_EXECUTESQL @SQL