Re: Database design, Keys and some other things
From: JOG <jog_at_cs.nott.ac.uk>
Date: 27 Sep 2005 08:45:43 -0700
Message-ID: <1127835943.217623.77570_at_g44g2000cwa.googlegroups.com>
Date: 27 Sep 2005 08:45:43 -0700
Message-ID: <1127835943.217623.77570_at_g44g2000cwa.googlegroups.com>
>> " The claim was made that the real world didn't contain
predicates that included artificial keys. So I guess that
means VIN, bank account number, and SSN are supernatural! Spooky!"
Marshall,
You have rather misunderstood. Noone has made any such claim the real world doesn't contain artificial identifiers such as VIN's and SSN's.
The claim was that if you are modelling the real world you should not have to add new imaginary keys, you're encoded predicate pretending as though they were properties of the real world statement, just for the database to work. It's a hack. Received on Tue Sep 27 2005 - 17:45:43 CEST