Re: A Question on Integrety

From: Paul Vernon <paul.vernon_at_ukk.ibmm.comm>
Date: Thu, 18 Dec 2003 10:46:45 -0000
Message-ID: <brs0p1$lne$>

"Bob Badour" <> wrote in message
> > A few years ago I remember wandering, at what point does an online
> "shopping cart" become an "order". Could a cart be considered an order
> > that is under construction? Or should the completed cart be "migrated"
> > to an order?
> It is mostly irrelevant with adequate physical and logical independence,
> and depends on the particular view an application sees.
> Does it really matter all that much whether: "A = B UNION C" or "B = A
> p" and "C = A WHERE NOT p" ?

Agreed. We just need a DBMS that allows us to instantly and repeatedly switch between such alternative sets of (what are considered as the) real tables.

Paul Vernon
Business Intelligence, IBM Global Services Received on Thu Dec 18 2003 - 11:46:45 CET

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