Much of the expectations will depend on whether the Masters degree follows the teaching route or the research one.

For the teaching path I'd expect a solid grounding of the theory expanding on that which would be gained from a Batchelors degree probably with a significant practical project which would probably be the main area of database experience gained albeit still very limited.

If it is gained through the research route then I'd expect very good and detailed knowledge of a very narrow aspect of the subject.