在sql觸發器更新中處理多行

Question

如何處理多行到更新觸發器/如何修改我的實際觸發器以具有當前行爲？如果我只更新一行的偉大工程，但如果我在同時更新多個行我得到的錯誤：

Msg 512, Level 16, State 1, Procedure TriggerUpdateAdvert, Line 9
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

這是我的觸發器：

ALTER TRIGGER dbo.TriggerUpdateAdvert 
ON dbo.Advert FOR UPDATE 
AS 
    DECLARE @OldStatus INT; 
    DECLARE @NewStatus INT; 
    DECLARE @ID UNIQUEIDENTIFIER; 

    SET @ID=(SELECT I.ID_Advert FROM INSERTED I); 
    PRINT @ID 
    SET @OldStatus=(SELECT D.Status FROM DELETED D WHERE D.ID_Advert=@ID); 
    SET @NewStatus=(SELECT I.Status FROM INSERTED I WHERE I.ID_Advert=@ID); 


    IF(@OldStatus!=@NewStatus) 
    BEGIN 
    print @OldStatus 
    print @NewStatus 
     IF(@NewStatus=1 or @NewStatus=3) 
     BEGIN 
      UPDATE Advert SET Published_Date=GETDATE() WHERE ID_Advert=@ID 
     END 
    END 


GO 

編輯：

我創建下一個代碼：

 UPDATE A 
     SET A.Published_Date=GETDATE() 
     FROM Advert A 
     INNER JOIN Inserted I ON A.ID_Advert=I.ID_Advert 
     INNER JOIN Deleted D ON D.ID_Advert=A.ID_Advert 
     WHERE I.Status!=D.Status AND (I.Status IN (1,3) AND D.Status NOT IN (1,3)) 

你有什麼想法嗎？

Answer 1

避免在觸發器中使用PRINT。

，並確定它是這樣的：

ALTER TRIGGER dbo.TriggerUpdateAdvert 
ON dbo.Advert FOR UPDATE 
AS 
    UPDATE Advert SET Published_Date=GETDATE() 
    WHERE ID_Advert IN (
    SELECT i.id 
    FROM inserted i 
    INNER JOIN deleted d 
    ON i.ID_Advert = d.ID_Advert 
    WHERE i.Status <> d.Status 
    AND i.Status IN (1,3) 
    ) 
END 

Answer 2

UPDATE a SET Published_Date = CURRENT_TIMESTAMP 
    FROM dbo.Advert AS a 
    INNER JOIN inserted AS i ON a.ID_Advert = i.ID_Advert 
    INNER JOIN deleted AS d ON i.ID_Advert = d.ID_Advert 
    WHERE i.Status IN (1,3) AND d.Status <> i.Status;