Re: About Entity Relation Diagram
From: Mark D Powell <Mark.Powell_at_eds.com>
Date: 18 Dec 2004 21:36:26 -0800
Message-ID: <1103434586.617384.190300_at_f14g2000cwb.googlegroups.com>
Date: 18 Dec 2004 21:36:26 -0800
Message-ID: <1103434586.617384.190300_at_f14g2000cwb.googlegroups.com>
I just grabbed the first online reference I could find that would allow quick access to the point, since my computer books are all still packed away as I just moved on the 6th of Dec. But the older the source the better from my point of view. I see you have an IBM email address. My early training was all based on IBM materials. A great many programmers seem ignorant of the fact that Dr E. F. Codd created relational algebra to describe his new theory of Relational databases while he worked for IBM. Later researches at IBM created SQL to be used with databases built on Dr Codd's theories. How to design for relational systems came next.
- Mark D Powell --