Re: About Entity Relation Diagram

From: Jonathan Leffler <jleffler_at_earthlink.net>
Date: Fri, 17 Dec 2004 15:01:31 GMT
Message-ID: <fxCwd.1772$RH4.337@newsread1.news.pas.earthlink.net>

Mark D Powell wrote:

> Traditionaly in RDBMS theory the ER design is the logical design while
> the actual implementation of the tables is the physical design
>
> "Logical design in RDBMS expressed in E-R diagrams"
> http://www.cob.sjsu.edu/sadhwa_a/database%20lecture%20Bus%2093.ppt
>
> This agrees with several texts I have packed away at home, but the the
> specifics or border between logical and physical design varies by
> author.

Am I allowed to be unimpressed by that presentation?

(Oh - sorry; well, I am unimpressed by it, even if you regard it as useful. 'OODMS: Latest development'? Was that produced in 1993?)

-- 
Jonathan Leffler                   #include <disclaimer.h>
Email: jleffler_at_earthlink.net, jleffler_at_us.ibm.com
Guardian of DBD::Informix v2003.04 -- http://dbi.perl.org/

Received on Fri Dec 17 2004 - 09:01:31 CST