关于sql server：T-SQL动态数据透视

T-SQL dynamic pivot

好的，我有一张像这样的桌子

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现在我要把它变成：

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号

我一直在研究动态透视示例，但似乎无法将它们应用到我的场景中。

有人能帮忙吗？

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请看下面的示例

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CREATE TABLE #Table (
ID INT,
ColumnName VARCHAR(250),
VALUE VARCHAR(250)
)

INSERT INTO #Table SELECT 1,'name','Peter'
INSERT INTO #Table SELECT 1,'phone','12345678'
INSERT INTO #Table SELECT 1,'email','[email protected]'
INSERT INTO #Table SELECT 2,'name','John'
INSERT INTO #Table SELECT 2,'phone','87654321'
INSERT INTO #Table SELECT 2,'email','[email protected]'
INSERT INTO #Table SELECT 3,'name','Sarah'
INSERT INTO #Table SELECT 3,'phone','55667788'
INSERT INTO #Table SELECT 3,'email','[email protected]'

---I assumed your tablename as TESTTABLE---
DECLARE @cols NVARCHAR(2000)
DECLARE @query NVARCHAR(4000)

SELECT @cols = STUFF(( SELECT DISTINCT TOP 100 PERCENT
'],[' + t.ColumnName
FROM #Table AS t
--ORDER BY '],[' + t.ID
FOR XML PATH('')
), 1, 2, '') + ']'

SELECT @cols

SET @query = N'SELECT ID,'+ @cols +' FROM
(SELECT t1.ID,t1.ColumnName , t1.Value FROM #Table AS t1) p
PIVOT (MAX([Value]) FOR ColumnName IN ( '+ @cols +' ))
AS pvt;'

EXECUTE(@query)

DROP TABLE #Table

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试试这个：

SQL Server 2005+

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;WITH
cte_name AS(SELECT * FROM <table> WHERE ColumnName='name'),
cte_phone AS(SELECT * FROM <table> WHERE ColumnName='phone'),
cte_email AS(SELECT * FROM <table> WHERE ColumnName='email')
SELECT n.ItemID,n.Value [Name],p.Value [Phone],e.Value [Email]
FROM cte_name n
JOIN cte_phone p
ON n.ItemID=p.ItemID
JOIN cte_email e
ON n.ItemID=e.ItemID

SQL小提琴演示

您不需要动态透视，因为它将是一个不同的表。只需这样做：

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name phone email
---------------------------------
Peter
123456
peter@host.com

检查这个SQL小提琴

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SELECT DISTINCT u.ItemID, n.Value AS 'name', p.Value AS 'phone', e.Value AS 'email'
FROM UserData u
INNER JOIN(
SELECT ItemID, VALUE
FROM UserData WHERE ColumnName = 'name') n ON n.ItemID = u.ItemID
INNER JOIN(
SELECT ItemID, VALUE
FROM UserData WHERE ColumnName = 'phone') p ON p.ItemID = u.ItemID
INNER JOIN(
SELECT ItemID, VALUE
FROM UserData WHERE ColumnName = 'email') e ON e.ItemID = u.ItemID

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以下是我用于联系人列表的查询：)

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SELECT *
FROM
(
SELECT Contact_Id AS CT
, [Age]
, [Sex]
, [State]
, [Country]
, [Keyword]
, [Married]
, [Kids]
, [Car]
FROM
(SELECT c.PropertyName
, c.ValueString
, c.Contact_Id
FROM
ContactProfiles c) AS ctp
PIVOT (MAX(ctp.ValueString) FOR PropertyName IN ([Age], [Sex], [State], [Country], [Keyword], [Married], [Kids], [Car])) AS PivotTable
) AS pvt

WHERE
pvt.[Age] > 18
AND (pvt.[State] = 'CA' OR pvt.[State] = 'NY')
AND pvt.[Sex] = 'F'
--*AND pvt.[Keyword] LIKE '%B;%'
AND pvt.[Married] = 'True'
AND pvt.[Kids] > 0

您是否尝试过：

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SELECT ItemID, name, phone, email
FROM
(SELECT [ItemID] ,[ColumnName] ,[VALUE] FROM Item) Item
PIVOT (MAX(VALUE) FOR ColumnName IN (name, phone, email) ) AS pvt

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