Re: questions about OODBMS

From: karl wettin <wettin_at_users.sourceforge.net>
Date: Wed, 21 May 2003 04:38:42 +0200
Message-ID: <20030521043842.46c50568.wettin@users.sourceforge.net>

On Tue, 20 May 2003 12:32:25 +0200
"Funs Lemmens" <antwoord_at_in.newsgroep> wrote:

> - Why can OODBMS sometimes encouter problems with encapsulation, and
> how does this reflect on the performance of a DBMS?

An OODBMS reflect your design.

> - Some queries like 'Find all employees who work on the finance
> department' can be successfully executed with OODBMS, but queries like
> 'Find all departments who have bookkeepers' cannot be executed with
> OODBMS. Can anyone give a reason why?

Sure they can.

Perhaps you are refeering to generalization and realization?

When is this due?

karl Received on Tue May 20 2003 - 21:38:42 CDT