SQL 通过触发器实现delete数据备份

SQL SERVER 通过触发器实现delete数据备份，触发器脚本如下：

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TRIGGER [dbo].[tgr_a_user_delete]
   ON [dbo].[A_User]
   for delete
AS 
BEGIN
  if (object_id('A_UserBak', 'U') is not null) 
  begin
  --存在A_UserBak，直接插入数据 
  insert into A_UserBak select *,GETDATE() as DeleteTime from deleted;  
  end
  else   
  begin
  --不存在A_UserBak创建再插入 
  select *,GETDATE() as DeleteTime into A_UserBak from deleted; 
  end

END

GO

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Author : 付义方