Re: Conceptual, Logical, and Physical views of data

From: Marshall Spight <marshall.spight_at_gmail.com>
Date: 8 Sep 2005 07:56:04 -0700
Message-ID: <1126191364.957567.73360@f14g2000cwb.googlegroups.com>

dawn wrote:

> I do want navigational
> operators, however and that seems to go against relational theory. I
> want to "click on" a foreign key value and navigate to the referenced
> entity.

Everything you can do with pointers you can do with relational operators. Pointers are neither necessary nor sufficient for "navigation"; that is, finding the data you want.

Addressing the data by its content, rather than by its location, provides a proper superset of the functionality of the navigational operators.

Marshall Received on Thu Sep 08 2005 - 09:56:04 CDT