如何从存储在表中的连接字符串连接到 SQL Server 数据库？

Question

I have a table called 'A' with these fields '{ id, Connection String}'

and In Sql Server, I want to excecute a command that connect to the first database in 'A' table from it's connection string and query it's table data.

Sudo code: select * from [db_connectionstring].dbo.mytable

Is this achievable ? I hop some one can help me here. :)

Answer 1

You can use the information in your table to generate and execute a

EXEC master.dbo.sp_addlinkedserver

https://docs.microsoft.com/en-us/sql/relational-databases/system-stored-procedures/sp-addlinkedserver-transact-sql

Statement then use the linked server you have created, you would have to check if you have already created the linked server.

this is better done from your app and not SQL server.

Answer 2

No, SQL Server can't connect to other SQL Servers via a connection string. It can do it via Linked Servers, provided they are set up in advance.

Maybe it could be done in a CLR procedure. Otherwise, what you are trying to do needs to be done in an external app.