SQL Server与Oracle的连接

Question

I'm trying to access an Oracle Database from MS SQL Server. I installed a local Oracle DB and tried this and everything worked OK.

But when I try to connect to a remote system (ie. an Oracle DB on another computer) it shows an error saying "ORA-01017 invalid username/password; logon denied".

I can connect to that computer with SQL Developer (with same user/pass).

What am I missing?

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Update 1:

Results of execute_sp_helplinkedsrvlogin :

Linked Server     LocalLogin     Is self Mapping     Remote Login
--------------    ----------     ---------------     -------------
192.168.0.56      sa             0                   sa

which is correct (target username is sa).

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Update 2 :

I can connect to that database with sqlplus with same username and password, even add and remove data.

Answer 1

Try running this in your SSMS:

execute sp_helplinkedsrvlogin

This should return a result indicating if a remote login has been setup for each linked server. If a remote login is not setup for your linked server, go to properties page for that linked server to add a remote login.