從一個表插入到另一個表和激活觸發器

INSERT INTO SaleItem (ProdId, SaleQuantity) 
SELECT ProdId, BasketProdQuantity FROM Basket; 

CREATE TRIGGER TRG_Stock_Decrease 
    ON SaleItem 
AFTER INSERT 
AS 
DECLARE @ProdId INT 
DECLARE @SaleQuantity INT 
SELECT @ProdId=ProdId,@SaleQuantity=SaleQuantity FROM inserted 
UPDATE Product SET [email protected] WHERE [email protected] 
UPDATE Product SET ProdNoOfSold [email protected] WHERE [email protected] 
DELETE FROM Basket Where ProdId = @ProdId

當我從Basket插入數據到SaleItem時，它工作正常，但只觸發第一個插入的id。我如何使它適用於所有ID？從一個表插入到另一個表和激活觸發器

編輯！我改變了我的觸發器，我猜這有點奏效。

CREATE TRIGGER TRG_Stock_Decrease 
    ON SaleItem 
AFTER INSERT 
AS 
BEGIN 
UPDATE Product SET ProdStockQuantity = ProdStockQuantity - (Select SaleQuantity From inserted Where Product.ProdId = inserted.ProdId) Where Product.ProdId IN (Select ProdId From inserted) 
UPDATE Product SET ProdNoOfSold =ProdNoOfSold + (Select SaleQuantity From inserted Where Product.ProdId = inserted.ProdId) Where Product.ProdId IN (Select ProdId From inserted) 
DELETE FROM Basket WHERE Basket.ProdId IN (Select ProdId From inserted) 
END

這是正確的嗎？

來源

2016-05-22 Uğurcan Erkal

SQL Server Management Studio中2012，如果你問。 –

正確，但被許多'SELECT FROM inserted'淹沒:) – gofr1

無需爲每一行或嵌套的選擇，只是內部聯接插入:)

CREATE TRIGGER TRG_Stock_Decrease 
    ON SaleItem 
AFTER INSERT 
AS 
    UPDATE P 
    SET ProdStockQuantity=ProdStockQuantity-i.SaleQuantity, 
     ProdNoOfSold =ProdNoOfSold+i.SaleQuantity 
    FROM Product P 
    INNER JOIN inserted i 
     ON P.ProdId=i.ProdId 


    DELETE B 
    FROM Basket B 
    INNER JOIN inserted i 
     ON i.ProdId = B.ProdId

來源

2016-05-22 21:58:29 gofr1

非常感謝！我總是使用單行觸發器，併爲我改變了很多東西。 :) –

好極了，如果有幫助！如果您保證用戶只插入/更新一行（在很多地方使用），但是如果插入/更新多行是使用此數據的最佳方式，那麼單行是很好的 - 可以將它與您所需的:) – gofr1

添加FOR EACH ROW

DROP TRIGGER `TRG_Stock_Decrease`; 
DELIMITER // 

CREATE TRIGGER TRG_Stock_Decrease 
AFTER INSERT ON `TABLE` FOR EACH ROW 
BEGIN 
    DECLARE @ProdId INT; 
    DECLARE @SaleQuantity INT; 
    SELECT @ProdId=ProdId,@SaleQuantity=SaleQuantity FROM inserted; 
    UPDATE Product SET [email protected] WHERE [email protected]; 
    UPDATE Product SET ProdNoOfSold [email protected] WHERE [email protected]; 
    DELETE FROM Basket Where ProdId = @ProdId; 
END; // 

DELIMITER ;

來源

2016-05-22 19:14:06

問題標記爲'SQL Server'而不是'Mysql' –

從一個表插入到另一個表和激活觸發器

回答

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