方法一:

SELECT * FROM OPENDATASOURCE(
'SQLOLEDB',
'Data Source=192.168.1.1;User ID=sa;Password=123456;'
).[数据库名].[dbo].[表名]

方法二:

exec sp_addlinkedserver 'srv_lnk','','sqloledb','192.168.1.1'
exec sp_addlinkedsrvlogin 'srv_lnk','false',null,'sa','123456'
go

SELECT * FROM [srv_lnk].[数据库名].[dbo].[表名]