涉及不同实例不同数据库的同一条sql语句

exec sp_configure 'show advanced options',1
reconfigure
exec sp_configure 'Ad Hoc Distributed Queries',1
reconfigure

select * from Product p inner join
opendatasource('SQLOLEDB','Data Source=Macaco-Online;user ID=sa;password=sa密码;').Company.dbo.Product p2
on P.PID=p2.PID

exec sp_configure 'Ad Hoc Distributed Queries',0
reconfigure
exec sp_configure 'show advanced options',0
reconfigure