我可以在具有相同实例的 SQL Server 上使用链接服务器到 SQL Server 吗？

Question

I would like to know what is the best way for use linkserver.

I have a database in SQL Server called Sales and another database called Menus . Both are on the same instance of JOSEPH-PC .

My question: is it necessary to use linked server for it?

Or can I simply write a query like this:

select * 
from Sales.dbo.table1 a 
inner join Menus.dbo.accces b on a.code = b.code

How could I store data in 2 tables from different databases for example a master-detail from my app in C#?

Please let me know how I can make this.

Answer 1

i dont think you can create the linked server for same sql server instance. that has to be different instance or different server.

if its about the best way to access the different database in same server same instance?? the synonyms is here for that purpose.

create the synonyms for access from Menus in sales then you can use the synonym like local table on sales database.

in sales database run the following command to create the synonyms for access so now in sales you can use menus_access as table, which will refer the access inside the menus database

CREATE SYNONYM menus_access 
FOR Menus.dbo.access;

now in sales you can access the table as

 select * from menus_access

Answer 2

You will need to create view on one of the two databases and make sure your connection string points to that database. You can create a view within SQL Server that connects to both databases like Create view across multiple databases

You might also like to view how to retrieve data from two different database using join in SQL Server 2005 the way you have tried to do it.