SQL Server触发器不工作

我有两个触发器，没有人在工作，但我不知道为什么，难道每个人都不能帮我吗：

插入：

CREATE TRIGGER [dbo].[afterInsert]

ON [dbo].[LinhasVenda]

FOR INSERT

AS

BEGIN
    DECLARE
        @IdVenda INT,
        @PrecoTotalSIva MONEY,
        @PrecoTotalCIva MONEY
    SELECT
        @PrecoTotalSIva = PrecoTotalSIva,
        @PrecoTotalCIva = PrecoTotalCIva
    FROM
        INSERTED
    UPDATE Vendas SET ValorSIva = ValorSIva + @PrecoTotalSIva,
    ValorCIva = ValorCIva + @PrecoTotalCIva WHERE
    IdVenda = @IdVenda
END

删除：

CREATE TRIGGER afterDelete

ON LinhasVenda

FOR DELETE
AS
BEGIN
    DECLARE
        @IdVenda INT,
        @IdArtifo INT,
        @PrecoTotalSIva MONEY,
        @PrecoTotalCIva MONEY

    SELECT
        @PrecoTotalSIva = PrecoTotalSIva,
        @PrecoTotalCIva = PrecoTotalCIva
    FROM
        DELETED

    UPDATE Vendas SET ValorSIva = ValorSIva - @PrecoTotalSIva,
    ValorCIva = ValorCIva - @PrecoTotalCIva WHERE
    IdVenda = @IdVenda
END

---

两个触发器都有两个缺陷。SELECT语句未分配WHERE子句中使用的@IdVenda值。此外，这些触发器不适用于多行INSERT/UPDATE语句。我建议您加入Insert/Delete，这将解决这两个问题。下面是一个示例，假设LinhasVenda表中的列名也命名为IdVenda

CREATE TRIGGER [dbo].[afterInsert]
ON [dbo].[LinhasVenda]
FOR INSERT
AS
BEGIN 

UPDATE v
SET
      ValorSIva = v.ValorSIva + i.PrecoTotalSIva
    , ValorCIva = v.ValorCIva + i.PrecoTotalCIva 
FROM Vendas AS v
JOIN INSERTED AS i ON
    i.IdVenda = v.IdVenda;

END;
GO

CREATE TRIGGER afterDelete
ON LinhasVenda 
FOR DELETE 
AS 
BEGIN

UPDATE v
SET
      ValorSIva = v.ValorSIva - d.PrecoTotalSIva
    , ValorCIva = v.ValorCIva - d.PrecoTotalCIva 
FROM Vendas AS v
JOIN DELETED AS d ON
    d.IdVenda = v.IdVenda;
END;
GO

---

“不起作用”不够精确，到底出了什么问题？太多了，你救了mt的命：）