我有一个字符串变量，其中包含一个动态列标题列表，如下所示：
DECLARE @Pivot VARCHAR(4000)
SELECT @Pivot = STUFF((SELECT DISTINCT ']),MAX([' + valv.ITEM_CMDT_N + ']) AS ' + valv.ITEM_CMDT_N + ',MAX([' + valv.ITEM_CMDT_N + ' - Date' FROM [dbo].[VEND_ASGN_LKUP_VAL] valv INNER JOIN [dbo].[VEND_ASGN] va ON valv.CTRY_C = va.CTRY_C AND valv.CY_DATE_D = va.CY_DATE_D WHERE va.VEND_ASGN_I = 10 AND va.ACTV_F= 1 AND valv.ACTV_F = 1 ORDER BY ']),MAX([' + valv.ITEM_CMDT_N + ']) AS ' + valv.ITEM_CMDT_N + ',MAX([' + valv.ITEM_CMDT_N + ' - Date' FOR XML PATH('')),1,3,'') + '])'
这可以很好地工作，并产生如下字符串：
MAX([TEST]) AS TEST,MAX([TEST - Date]),MAX([TEST2]) AS TEST2,MAX([TEST2 - Date])
但是请注意，只有第一个字段 ( ITEM_CMDT_N) 包含别名。如果我尝试将类似的代码添加到第二个字段的别名，它看起来像这样：
SELECT @Pivot = STUFF((SELECT DISTINCT ']) AS [' + valv.ITEM_CMDT_N + ' - Date],MAX([' + valv.ITEM_CMDT_N + ']) AS ' + valv.ITEM_CMDT_N + ',MAX([' + valv.ITEM_CMDT_N + ' - Date' FROM [dbo].[VEND_ASGN_LKUP_VAL] valv INNER JOIN [dbo].[VEND_ASGN] va ON valv.CTRY_C = va.CTRY_C AND valv.CY_DATE_D = va.CY_DATE_D WHERE va.VEND_ASGN_I = 10 AND va.ACTV_F= 1 AND valv.ACTV_F = 1 ORDER BY ']) AS [' + valv.ITEM_CMDT_N + ' - Date],MAX([' + valv.ITEM_CMDT_N + ']) AS ' + valv.ITEM_CMDT_N + ',MAX([' + valv.ITEM_CMDT_N + ' - Date' FOR XML PATH('')),1,3,'') + '])'
并产生这样的字符串：
AS [TEST - Date],MAX([TEST]) AS TEST,MAX([TEST - Date]) AS [TEST2 - Date],MAX([TEST2]) AS TEST2,MAX([TEST2 - Date])
这显然不是我的目标。如何'valv.ITEM_CMDT_N + ' - Date'在仍然使用 FOR XML PATH 代码的同时调整此字符串初始化以包含字段的别名？谢谢！