SQL Server：爲審計/歷史記錄創建觸發器表

Question

我正在創建我的第一個SQL Server觸發器，並且在插入另一個表後查找INSERT到「歷史記錄」表中。我認爲我編寫了大部分代碼，但似乎無法完成語法。當前格式指出「HistoryColumnName」和「HistoryNewValue」無效。我已經嘗試了JOIN到變量表@HistoryRecord，但它沒有真正意義，因爲它們是獨立的。下面

代碼：

CREATE TRIGGER CreateHardwareAssetHistoryRecord 
ON HardwareAsset 
AFTER INSERT AS 

DECLARE 
@HardwareAssetID UNIQUEIDENTIFIER, 
@HardwareAssetTitle VARCHAR(256), 
@HardwareAssetSerialNumber VARCHAR(256) 
SET @HardwareAssetID = (SELECT HardwareAssetID FROM inserted) 
SET @HardwareAssetTitle = (SELECT HardwareAssetTitle FROM inserted) 
SET @HardwareAssetSerialNumber = (SELECT HardwareAssetSerialNumber FROM inserted) 

DECLARE @HistoryRecord TABLE (HistoryColumnName VARCHAR(256) NOT NULL, HistoryNewValue VARCHAR(256) NOT NULL) 
INSERT @HistoryRecord(HistoryColumnName,HistoryNewValue) VALUES('Asset Name', @HardwareAssetTitle) 
INSERT @HistoryRecord(HistoryColumnName,HistoryNewValue) VALUES('Serial Number', @HardwareAssetSerialNumber) 

BEGIN 

WHILE EXISTS(SELECT HistoryColumnName,HistoryNewValue FROM @HistoryRecord) 

INSERT INTO HardwareAssetHistory 
(HardwareAssetHistoryChangeTypeID, HardwareAssetHistoryUpdatedByID, HardwareAssetHistoryColumnName, HardwareAssetHistoryOldValue, HardwareAssetHistoryNewValue, HardwareAssetHistoryHardwareAssetID) 
SELECT '1', HardwareAssetCreatedByID, HistoryColumnName, '', HistoryNewValue, HardwareAssetID 
FROM HardwareAsset 
WHERE HardwareAssetID = @HardwareAssetID 

END 
GO 

任何建議或幫助，將不勝感激。

注意：因爲我們使用的是由@ nick.mcdermaid如指出，下面就不會當有多個行

Answer 1

您可以通過選擇其他值做到這一點沒有你的臨時表且參考原來HardwareAsset表變量。

CREATE TRIGGER CreateHardwareAssetHistoryRecord ON HardwareAsset INSERT AS BEGIN DECLARE @HardwareAssetID UNIQUEIDENTIFIER， @HardwareAssetTitle VARCHAR（256）， @HardwareAssetSerialNumber VARCHAR（256）， @HardwareAssetCreatedByID INT --change什麼是後這

SELECT @HardwareAssetID = HardwareAssetID, @HardwareAssetTitle = HardwareAssetTitle 
      , @HardwareAssetSerialNumber = HardwareAssetSerialNumber 
      , @HardwareAssetCreatedByID = HardwareAssetCreatedByID FROM inserted 

    INSERT INTO HardwareAssetHistory(HardwareAssetHistoryChangeTypeID 
         , HardwareAssetHistoryUpdatedByID, HardwareAssetHistoryColumnName 
         , HardwareAssetHistoryOldValue, HardwareAssetHistoryNewValue 
         , HardwareAssetHistoryHardwareAssetID) 
    VALUES ('1', @HardwareAssetCreatedByID, 'Asset Name', '', @HardwareAssetTitle 
                , @HardwareAssetID), 
     ('1', @HardwareAssetCreatedByID, 'Serial Number', '', @HardwareAssetSerialNumber 
                , @HardwareAssetID) 
END 
GO 

01數據類型

UPDATE：這將多行以及工作：

CREATE TRIGGER CreateHardwareAssetHistoryRecord 
    ON HardwareAsset 
AFTER INSERT AS 
BEGIN 

    DECLARE @insertedTemp AS TABLE (HardwareAssetID UNIQUEIDENTIFIER, HardwareAssetTitle VARCHAR(256), HardwareAssetSerialNumber VARCHAR(256), HardwareAssetCreatedByID INT) 

    INSERT INTO @insertedTemp(HardwareAssetID, HardwareAssetTitle, HardwareAssetSerialNumber, HardwareAssetCreatedByID) 
    SELECT HardwareAssetID, HardwareAssetTitle, HardwareAssetSerialNumber, HardwareAssetCreatedByID FROM inserted 

    INSERT INTO HardwareAssetHistory(HardwareAssetHistoryChangeTypeID 
         , HardwareAssetHistoryUpdatedByID, HardwareAssetHistoryColumnName 
         , HardwareAssetHistoryOldValue, HardwareAssetHistoryNewValue 
         , HardwareAssetHistoryHardwareAssetID)  
    SELECT '1', HardwareAssetCreatedByID, 'Asset Name', '', HardwareAssetTitle, @HardwareAssetID 
    FROM @insertedTemp 

UNION  

    SELECT '1', HardwareAssetCreatedByID, 'Serial Number', '', HardwareAssetSerialNumber, HardwareAssetID 
    FROM @insertedTemp  
END 
GO 

Answer 2

嘗試這篇文章。它將幫助您瞭解創建AFTER INSERT觸發器的每一步。 AFTER INSERT TRIGGERS