--數據較少時,可以手工同步,更方便控制
--用觸發器即時同步兩個表的實例:
--測試環境:SQL2000,遠程主機名:xz,用戶名:sa,密碼:無,數據庫名:test
--創建測試表,不能用標識列做主鍵,因爲不能進行正常更新
--在遠程主機上建表
if exists (select * from dbo.sysobjects where id = object_id(N'[test]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [test]
create table test(id int not null constraint PK_test primary key
?,name varchar(10))
go
--以下操作在本機進行
--在本機上建表及做同步處理的工作
if exists (select * from dbo.sysobjects where id = object_id(N'[test]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [test]
create table test(id int identity(1,1) primary key
?,name varchar(10))
go
--創建同步的觸發器
create trigger t_test on test
for insert,update,delete
as
set? XACT_ABORT on
--啓動遠程服務器的MSDTC服務
exec master..xp_cmdshell 'isql /S"xz" /U"sa" /P"" /q"exec master..xp_cmdshell ''net start msdtc'',no_output"',no_output
--啓動本機的MSDTC服務
exec master..xp_cmdshell 'net start msdtc',no_output
--進行分佈事務處理,如果表用標識列做主鍵,用下面的方法
BEGIN DISTRIBUTED TRANSACTION
delete from openrowset('sqloledb','xz';'sa';'',test.dbo.test)
?where id in(select id from deleted)
insert into openrowset('sqloledb','xz';'sa';'',test.dbo.test)
?select * from inserted
commit tran
go
--插入數據測試
insert into test
select 1,'aa'
union all select 2,'bb'
union all select 3,'c'
union all select 4,'dd'
union all select 5,'ab'
union all select 6,'bc'
union all select 7,'ddd'
--刪除數據測試
delete from test where id in(1,4,6)
--更新數據測試
update test set name=name+'_123' where id in(3,5)
--顯示測試的結果
select * from test a full join
openrowset('sqloledb','xz';'sa';'',test.dbo.test) b on a.id=b.id
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