Re: Clean Object Class Design -- What is it?

On 17 Jul 2001, Galen Boyer wrote:

> On Mon, 16 Jul 2001, bbadour_at_golden.net wrote:
>
> >>Object databases take care of
> >>inheritance hierarchies internally.
> >
> > As do relational databases.
>
> I don't understand how a relational database can represent
> inheritance. Most of the time, I can take an object model and
> logically map it to a relational model, because of, well, the
> relationships, but how do you model inheritance in a DB?
> --
> Galen Boyer
> It seems to me, I remember every single thing I know.
>
>

Inheritance hierarchies have been the subject of some discussion within ANSI/ISO I believe. A number of Object-Relational products support it. You might wish to have a look at something like PostgreSQL:

http://www.postgresql.com/
http://www.postgresql.org/

which is widely available.

akmal

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