Question

我的公司需要Customer表中的列，该列将显示任何客户的先前地址数。每当地址更新时，此号码必须自动更新。

 CREATE TRIGGER deleted_address ON tblcustomer
 INSTEAD OF INSERT
 AS
 BEGIN
 SET NOCOUNT ON

 end

到目前为止，我有这个但是我已经遇到了一个问题，我不知道如果编辑了客户的地址，它会将旧地址添加到名为{{ 1}}然后更新PreviousAddress

Answer 1

尝试看看这是否适合您：

CREATE TRIGGER deleted_address ON tblcustomer
AFTER UPDATE
AS
BEGIN
    IF UPDATE (CustomerAddress)
    UPDATE t
    SET t.[PreviousAddress] = t.PreviousAddress + 1,
        t.CustomerAddress = i.CustomerAddress
    FROM tblcustomer t
    JOIN INSERTED i ON t.customer_id = i.customer_id
END
GO

Answer 2

要更新以前的地址，您可以编写这样的触发器。

CREATE TRIGGER trg_UpdateAddress
   ON  Customer
   AFTER UPDATE
AS 
BEGIN
    DECLARE @id INT = (SELECT ID FROM DELETED)
    UPDATE dbo.Customer SET PreviousAddress = (SELECT Address FROM DELETED )
    WHERE ID = @id
END

Answer 3

使用AFTER UPDATE触发器：

CREATE TRIGGER deleted_address ON tblcustomer
AFTER UPDATE
AS
BEGIN
   SET NOCOUNT ON


   IF UPDATE (Address)
      UPDATE t SET countPrev = countPrev + 1, oldAddress = d.Address
      FROM tblcustomer t
      JOIN INSERTED i ON t.customer_id = i.customer_id
      JOIN DELETED d  ON t.customer_id = d.customer_id

END

更新时的SQL Server移动到单独的列

3 个答案: