Question

我在使用pivot命令时遇到问题 - 我收到以下错误

“无效的列名称'2013-03-22'。无效的列名'2013-03-29'。无效的列名'2013-04-05'。列名称'卷'无效。列名无效'周末结束日期”“。

运行此代码时

SELECT * 
FROM
(
   SELECT [Area], 
     [Region], 
     [Channel], 
     [Controller], 
     [2013-03-22] AS _dt1, 
     [2013-03-29] AS _dt2, 
     [2013-04-05] AS _dt3 
  FROM [DataTable]
) AS SourceTable
PIVOT
(
   SUM ([Volume]) 
   FOR [Week Ending Date] IN ([2013-03-22], [2013-03-29], [2013-04-05])
) AS PivotTable

它似乎符合正确的格式..任何想法？

Answer 1

似乎源表不应包含要转动的列的值，但应包含包含要转动的值和要转动的值的列。见下文：

SELECT [Area], 
[Region], 
[Channel], 
[Controller],
[2013-03-22] as _dt1, 
[2013-03-29] as _dt2, 
[2013-04-05] as _dt3
FROM 
(
SELECT [Area], 
[Region], 
[Channel], 
[Controller], 
[Volume],
[Week Ending Date]
FROM [DataTable]
) AS SourceTable 
PIVOT(SUM ([Volume]) FOR [Week Ending Date] IN ([2013-03-22], [2013-03-29], 
[2013-04-05])) 
AS PivotTable

Answer 2

通常我动态地使用数据透视表列然后运行执行sp_executesql @query

找到截然不同的日期＆＃39; 2013-03-22＆＃39; ...然后把它变成字符串使用STUFF和XML PATH
将其替换为嵌入式SQL查询

所以你永远不会难以对你的专栏进行编码

这里有我的例子

 DECLARE @cols AS NVARCHAR(MAX),   @query  AS NVARCHAR(MAX)
   select @cols = STUFF((SELECT  N',' + QUOTENAME(c.name) 
   FROM sys.tables AS t
   INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
   WHERE t.name = 'tagCloudLibrary'
    and c.name not in ('langID')
    FOR XML PATH(''), TYPE ).value('.', 'NVARCHAR(MAX)')  ,1,1,'')


    set @query = N'SELECT ' + @cols + N' from tagCloudLibrary'
    execute sp_executesql @query;

如果你的PIVOT是正确的，请在正确处理STUFF的条款......

  DECLARE @cols AS NVARCHAR(MAX),   @query  AS NVARCHAR(MAX)
   select @cols = STUFF((SELECT top 10  N',' + QUOTENAME(LastActivityDate)  
   FROM DataTable   
     FOR XML PATH(''), TYPE ).value('.', 'NVARCHAR(MAX)')  ,1,1,'')

     select @cols

     set query = N'SELECT * FROM
      (SELECT [Area], [Region], [Channel], [Controller], ' +  @cols 
     + N' FROM [DataTable]) AS SourceTable '
    + N' PIVOT  (SUM ([Volume]) FOR [Week Ending Date] IN (' +  @cols  + ') AS PivotTable '

     execute sp_executesql @query;

SQL - 使用pivot命令时出错

2 个答案: