sqlserver的openquery配置

1.命令Demo

---openquery--开启Ad Hoc Distributed Queries组件，在sql查询编辑器中执行如下语句exec sp_configure 'show advanced options',1reconfigureexec sp_configure 'Ad Hoc Distributed Queries',1reconfigure--关闭Ad Hoc Distributed Queries组件，在sql查询编辑器中执行如下语句exec sp_configure 'Ad Hoc Distributed Queries',0reconfigureexec sp_configure 'show advanced options',0reconfigure--这句是映射一个远程数据库exec sp_addlinkedserver   'LHGZPT', '', 'SQLOLEDB', '202.96.25.49,1433'--这句是登录远程数据库exec sp_addlinkedsrvlogin 'LHGZPT','false ',null, 'sino', '1qaz!QAZ'--将另一个库中查询到的数据保存在本地库中insert into lh_applyinfo(id,applyid,applytype,applystatus)select * from openquery(LHGZPT,'SELECT id,applyid,applytype,applystatus FROM lhgzpt_nei.dbo.lh_applyinfo with(nolock) where create_date between ''2018-07-01 00:00:01'' and ''2018-10-31 23:00:01'' ')--以后不再使用时删除链接服务器exec sp_dropserver  'ITSV ', 'droplogins '

2.解决自增主键问题

--允许将显式值插入表的标识列中 ON-允许 OFF-不允许

set identity_insert OrderList ON--打开insert into OrderList(id,ordername,createdate)values(4520,'set',getdate())set identity_insert OrderList OFF--关闭

3.如果后期有数据库修改了密码，可通过页面修改远程链接