简单的两个表数据同步的触发器

定义两个表：
表1：
CREATE TABLE [t1] (
[file1] [char] (10) COLLATE Chinese_PRC_CI_AS NULL ,
[file2] [char] (10) COLLATE Chinese_PRC_CI_AS NULL
) ON [PRIMARY]
GO
表2：
CREATE TABLE [t2] (
[file3] [char] (10) COLLATE Chinese_PRC_CI_AS NULL ,
[file4] [char] (10) COLLATE Chinese_PRC_CI_AS NULL
) ON [PRIMARY]
GO
在表t1上面创建两个触发器，一个是更新，新增时候的，一个是删除的。
CREATE TRIGGER Insert ON [dbo].[t1]
FOR UPDATE ,INSERT
AS
INSERT INTO t2
(t2. file3,t2.file4)
select * from inserted

CREATE TRIGGER Dele ON [dbo].[t1]
FOR DELETE
AS
delete from t2 where t2.file3 = (select file1 from deleted)