So is this standard for linked servers? Or just non-microsoft sql servers?

[Edit] I am a programmer, not a DBA, just happens that I'm the only one here that has a decent amount of experience with SQL. I am writing a web app to replace an Access front-end. The DB2 data is dumped to our local SQL server, but changes are in the works there, so I want to query the DB2 data and update the local db I am creating.