--创建测试表,不能用标识列做主键,因为不能进行正常更新
--在远程主机上建表
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
--以下操作在本机进行
--在本机上建表及做同步处理的工作
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
--创建同步的触发器
create trigger t_test on test
for insert,update,delete
as
set XACT_ABORT on
--启动远程服务器的MSDTC服务
exec master..xp_cmdshell 'isql /S"xz" /U"sa" /P"" /q"exec master..xp_cmdshell ''net start msdtc'',no_output"',no_output
--进行分布事务处理,如果表用标识列做主键,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
--插入数据测试
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'
--删除数据测试
delete from test where id in(1,4,6)
--更新数据测试
update test set name=name+'_123' where id in(3,5)
--显示测试的结果
select * from test a full join
openrowset('sqloledb','xz';'sa';'',test.dbo.test) b on a.id=b.id
--服务器上的表(查询分析器连接到服务器上创建)
--state字段为辅助更新而设置的附加字段,字段值说明:null 表示新增记录,1 表示修改过的记录,0 表示无变化的记录
if exists (select * from dbo.sysobjects where id = object_id(N'[luser]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [luser]
GO
create table [luser](id int identity(1,1) primary key,[user] varchar(4),pwd varchar(10),address varchar(50),state bit)
go
--创建触发器,维护state字段的值
create trigger t_state on [luser]
after update
as
update [luser] set state=1
from [luser] a join inserted b on a.id=b.id
where a.state is not null
go
----以下在局域网(本机操作)
if exists (select * from dbo.sysobjects where id = object_id(N'[luser]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [luser]
create table [luser](id int primary key,[user] varchar(4),pwd varchar(10),address varchar(50))
go
--为了方便同步处理,创建链接服务器到要同步的服务器
--这里的远程服务器名:rserver,用户名为:ruser,密码:rpwd
if exists(select 1 from master..sysservers where srvname='srv_lnk')
exec sp_dropserver 'srv_lnk','droplogins'
go
exec sp_addlinkedserver 'srv_lnk','','SQLOLEDB','rserver'
exec sp_addlinkedsrvlogin 'srv_lnk','false',null,'ruser','rpwd'
go
--创建同步处理的存储过程
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[p_synchro]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[p_synchro]
GO
create proc p_synchro
as
/*--因为MSDTC服务(分布式事务处理需要)工作不稳定,所以下面部分为选用内容
--set XACT_ABORT on
--启动远程服务器的MSDTC服务
--exec master..xp_cmdshell 'isql /S"rserver" /U"ruser" /P"rpwd" /q"exec master..xp_cmdshell ''net start msdtc'',no_output"',no_output
--进行分布事务处理,如果表用标识列做主键,用下面的方法
--BEGIN DISTRIBUTED TRANSACTION
--*/
--同步删除的数据
delete from [luser]
where id not in(select id from srv_lnk.test.dbo.[luser])
--同步新增的数据
insert into [luser]
select id,[user],pwd,address from srv_lnk.test.dbo.[luser]
where state is null
--同步修改的数据
update [luser] set
[user]=b.[user],pwd=b.pwd,address=b.address
from [luser] a
join srv_lnk.test.dbo.[user] b on a.id=b.id
where b.state=1
--同步后更新服务器上的标志
update srv_lnk.test.dbo.[luser] set state=0 where isnull(state,1)=1
--COMMIT TRAN --如果启用分布式事务处理,加上此句
go
--创建作业,定时执行数据同步的存储过程
if exists(SELECT 1 from msdb..sysjobs where name='数据处理')
EXECUTE msdb.dbo.sp_delete_job @job_name='数据处理'
exec msdb..sp_add_job @job_name='数据处理'