Sql server 使用VARCHAR列透视SQL Server表时出现语法错误_Sql Server_Pivot_Pivot Table

Sql server 使用VARCHAR列透视SQL Server表时出现语法错误

sql-server

Sql server 使用VARCHAR列透视SQL Server表时出现语法错误,sql-server,pivot,pivot-table,Sql Server,Pivot,Pivot Table,我在SQL Server中有一个表（约50m行），如下所示： PId CustomColumnName CustomColumnValue 1 PropertyA 1 1 PropertyB B 1 PropertyC C 2 PropertyA 1.5 2 Prope

我在SQL Server中有一个表（约50m行），如下所示：

PId        CustomColumnName        CustomColumnValue
1          PropertyA               1
1          PropertyB               B
1          PropertyC               C
2          PropertyA               1.5
2          PropertyB               BB
2          PropertyC               CC
3          PropertyD               D1
3          PropertyA               2.0

我想

透视该表，使其看起来像这样：
PId    PropertyA    PropertyB    PropertyC    PropertyD
1      1            B            C            NULL
2      1.5          BB           CC           NULL
3      2.0          NULL         NULL         D1

  SELECT *
  FROM 
  ( 
  SELECT [PId], [CustomColumnName], [CustomColumnValue] 
  FROM [myTable]
  ) AS src
  PIVOT
  (
  MAX([CustomColumnValue]) -- Not sure how to aggregate VARCHAR data here
  FOR [CustomColumnName] IN ('PropertyA', 'PropertyB', 'PropertyC', 'PropertyD')
  ) AS pvt

我知道SQL Server有PIVOT
功能，所以我写了如下内容：
PId    PropertyA    PropertyB    PropertyC    PropertyD
1      1            B            C            NULL
2      1.5          BB           CC           NULL
3      2.0          NULL         NULL         D1

  SELECT *
  FROM 
  ( 
  SELECT [PId], [CustomColumnName], [CustomColumnValue] 
  FROM [myTable]
  ) AS src
  PIVOT
  (
  MAX([CustomColumnValue]) -- Not sure how to aggregate VARCHAR data here
  FOR [CustomColumnName] IN ('PropertyA', 'PropertyB', 'PropertyC', 'PropertyD')
  ) AS pvt

但是我在“PropertyA”附近得到了不正确的语法。我不确定使用SQL Server的PIVOT
功能是否可以完成我正在尝试的操作（因为我认为我无法聚合[CustomColumnValue]
，这是VARCHAR
类型）如果在我的用例中使用PIVOT
不可行，是否有一种有效的替代方法来实现我想要做的事情
提前感谢您的建议/回答
 --删除单引号，您将获得所需的结果集
;With cte(PId, CustomColumnName,CustomColumnValue)
    AS
    (
    SELECT 1,'PropertyA','1'    Union all
    SELECT 1,'PropertyB','B'    Union all
    SELECT 1,'PropertyC','C'    Union all
    SELECT 2,'PropertyA','1.5'  Union all
    SELECT 2,'PropertyB','BB'   Union all
    SELECT 2,'PropertyC','CC'   Union all
    SELECT 3,'PropertyD','D1'   Union all
    SELECT 3,'PropertyA','2.0'
    )
     SELECT *
      FROM 
      ( 
      SELECT [PId], [CustomColumnName], [CustomColumnValue] 
      FROM cte
      ) AS src
      PIVOT
      (
      MAX([CustomColumnValue]) 
      FOR [CustomColumnName] IN (PropertyA, PropertyB, PropertyC, PropertyD)
      ) AS pvt

您可以使用Dynamic Pivot生成相同的结果集
IF OBJECT_ID('tempdb..#temp') IS NOT NULL
Drop table #temp
;With cte(PId, CustomColumnName,CustomColumnValue)
AS
(
SELECT 1,'PropertyA','1'    Union all
SELECT 1,'PropertyB','B'    Union all
SELECT 1,'PropertyC','C'    Union all
SELECT 2,'PropertyA','1.5'  Union all
SELECT 2,'PropertyB','BB'   Union all
SELECT 2,'PropertyC','CC'   Union all
SELECT 3,'PropertyD','D1'   Union all
SELECT 3,'PropertyA','2.0'
)
SELECT * INTO #temp FROM cte

Declare 
         @Sql nvarchar(max),
         @dynamicCol nvarchar(max)
--Create columns Dynamically
SELECT @dynamicCol=STUFF((SELECT DISTINCT ', '+ QUOTENAME(CustomColumnName )
From  #temp For XML PATH ('')),1,1,'')

--SELECT @dynamicCol

SET @Sql='
SELECT [PId] ,'+ @dynamicCol +' From
(
SELECT [PId], [CustomColumnName], [CustomColumnValue]  From
#temp
)AS Src
PIVOT 
(
MAX([CustomColumnValue]) For [CustomColumnName] IN ('+@dynamicCol+')
)
AS Pvt'

PRINT @Sql

EXEC(@Sql)

--删除单引号，您将获得所需的结果集
;With cte(PId, CustomColumnName,CustomColumnValue)
    AS
    (
    SELECT 1,'PropertyA','1'    Union all
    SELECT 1,'PropertyB','B'    Union all
    SELECT 1,'PropertyC','C'    Union all
    SELECT 2,'PropertyA','1.5'  Union all
    SELECT 2,'PropertyB','BB'   Union all
    SELECT 2,'PropertyC','CC'   Union all
    SELECT 3,'PropertyD','D1'   Union all
    SELECT 3,'PropertyA','2.0'
    )
     SELECT *
      FROM 
      ( 
      SELECT [PId], [CustomColumnName], [CustomColumnValue] 
      FROM cte
      ) AS src
      PIVOT
      (
      MAX([CustomColumnValue]) 
      FOR [CustomColumnName] IN (PropertyA, PropertyB, PropertyC, PropertyD)
      ) AS pvt

您可以使用Dynamic Pivot生成相同的结果集
IF OBJECT_ID('tempdb..#temp') IS NOT NULL
Drop table #temp
;With cte(PId, CustomColumnName,CustomColumnValue)
AS
(
SELECT 1,'PropertyA','1'    Union all
SELECT 1,'PropertyB','B'    Union all
SELECT 1,'PropertyC','C'    Union all
SELECT 2,'PropertyA','1.5'  Union all
SELECT 2,'PropertyB','BB'   Union all
SELECT 2,'PropertyC','CC'   Union all
SELECT 3,'PropertyD','D1'   Union all
SELECT 3,'PropertyA','2.0'
)
SELECT * INTO #temp FROM cte

Declare 
         @Sql nvarchar(max),
         @dynamicCol nvarchar(max)
--Create columns Dynamically
SELECT @dynamicCol=STUFF((SELECT DISTINCT ', '+ QUOTENAME(CustomColumnName )
From  #temp For XML PATH ('')),1,1,'')

--SELECT @dynamicCol

SET @Sql='
SELECT [PId] ,'+ @dynamicCol +' From
(
SELECT [PId], [CustomColumnName], [CustomColumnValue]  From
#temp
)AS Src
PIVOT 
(
MAX([CustomColumnValue]) For [CustomColumnName] IN ('+@dynamicCol+')
)
AS Pvt'

PRINT @Sql

EXEC(@Sql)

删除引号
PId | PropertyA | PropertyB | PropertyC | PropertyD
--: | :-------- | :-------- | :-------- | :--------
1 | 1 | B | C |空
2 | 1.5 | BB | CC |空
3 | 2.0 |零|零| D1
dbfiddle
删除引号
PId | PropertyA | PropertyB | PropertyC | PropertyD
--: | :-------- | :-------- | :-------- | :--------
1 | 1 | B | C |空
2 | 1.5 | BB | CC |空
3 | 2.0 |零|零| D1
dbfiddle
您需要使用列的quotename
SELECT *
  FROM 
  ( 
  SELECT [PId], [CustomColumnName], [CustomColumnValue] 
  FROM [myTable]
  ) AS src
  PIVOT
  (
  MAX([CustomColumnValue]) -- Not sure how to aggregate VARCHAR data here
  FOR [CustomColumnName] IN ([PropertyA], [PropertyB], [PropertyC], [PropertyD])  --provide in squarebrackets if generating dynamic then use quotename() function of sql server
  ) AS pvt

您需要使用列的quotename
SELECT *
  FROM 
  ( 
  SELECT [PId], [CustomColumnName], [CustomColumnValue] 
  FROM [myTable]
  ) AS src
  PIVOT
  (
  MAX([CustomColumnValue]) -- Not sure how to aggregate VARCHAR data here
  FOR [CustomColumnName] IN ([PropertyA], [PropertyB], [PropertyC], [PropertyD])  --provide in squarebrackets if generating dynamic then use quotename() function of sql server
  ) AS pvt

从列名PropertyA
周围取单引号，等等从列名PropertyA
周围取单引号，等等感谢您提供全面的答案，包括动态解决方案！感谢您提供全面的答案，包括动态解决方案！非常感谢。删除单引号并将其视为列名非常有效！我接受了另一个答案，因为s/he还提供了动态列的解决方案。希望您能理解。：）非常感谢。删除单引号并将其视为列名非常有效！我接受了另一个答案，因为s/he还提供了动态列的解决方案。希望您能理解。：）非常感谢。删除单引号并将其视为列名非常有效！我接受了另一个答案，因为s/he还提供了动态列的解决方案。希望您能理解。：）非常感谢。删除单引号并将其视为列名非常有效！我接受了另一个答案，因为s/he还提供了动态列的解决方案。希望您能理解。：）