如何在while循環中多次存儲臨時表？

Question

我在做一個內部聯接，它

例如，我試圖做到這一點，每次插入新的列到我的表：

WHILE @Counter <= @MaxCount 
BEGIN 
    SELECT @ParameterDefinitionID = ParameterDefinitionID FROM #CachedParameterDefinitionIDs WHERE RowNumber = @Counter 
    SELECT * INTO #ContactsWithPatientID FROM #ContactsWithPatientID INNER JOIN (SELECT Parameter2.ContactID AS 'Parameter2ContactID', Parameter2.Value AS FirstName FROM #CachedParameterValues Parameter2 WHERE ParameterDefinitionID = @ParameterDefinitionID) FirstNameTable ON #ContactsWithPatientID.ContactID = FirstNameTable.Parameter2ContactID 
    SET @Counter = @Counter + 1 
END 

它不會在工作第一因爲：

There is already an object named '#ContactsWithPatientID' in the database. 

我該如何使它工作？有沒有其他方法可以做到這一點？我這樣做是因爲我需要在查詢中追加一定數量的行作爲列。

Answer 1

創建該表第一

CREATE TABLE #ContactsWithPatientID (...) 
WHILE @Counter <= @MaxCount 
BEGIN 
    SELECT @ParameterDefinitionID = ParameterDefinitionID 
    FROM #CachedParameterDefinitionIDs 
    WHERE RowNumber = @Counter 

    INSERT #ContactsWithPatientID 
    SELECT * 
    FROM #ContactsWithPatientID 
      INNER JOIN 
      (SELECT Parameter2.ContactID AS 'Parameter2ContactID', Parameter2.Value AS FirstName 
      FROM #CachedParameterValues Parameter2 
      WHERE ParameterDefinitionID = @ParameterDefinitionID) FirstNameTable ON #ContactsWithPatientID.ContactID = FirstNameTable.Parameter2ContactID 

    SET @Counter = @Counter + 1 
END 

這幾乎可以肯定是一個完成去得爲遞歸CTE可能