Question

出于某种原因，我的触发器无法正常工作。我试图创建一个在客户付费时更新的触发器。

以下是代码：

Select * from customers
Select * from customerAudit

CREATE TRIGGER tr_customer_ForUpdate
ON customers
FOR UPDATE
AS  
BEGIN 
    INSERT INTO customerAudit 
       SELECT
          'Customer with ID = ' + Cast (customersID as NVARCHAR(5)) + ' paid at ' + cast(Getdate() as NVARCHAR(20))
       FROM 
          updated;
END

updated包含无效的对象名称，customersID的列名无效。我非常困惑:(

Answer 1

SQL Server触发器中的伪表称为Deleted（对于UPDATE的旧值）和Inserted（对于新值，在UPDATE之后 - 不是Updated。

试试这个：

INSERT INTO customerAudit (ColumnName)
   SELECT
      'Customer with ID = ' + Cast (customersID as NVARCHAR(5)) + ' paid at ' + cast(Getdate() as NVARCHAR(20))
   FROM 
      Inserted;

SQL Server：触发错误客户

1 个答案: