Re: object algebra
From: Neo <neo55592_at_hotmail.com>
Date: 23 Feb 2004 14:44:33 -0800
Message-ID: <4b45d3ad.0402231444.2f77c935_at_posting.google.com>
Date: 23 Feb 2004 14:44:33 -0800
Message-ID: <4b45d3ad.0402231444.2f77c935_at_posting.google.com>
> > RDM's fundamental design ensures NULLs will occur in some applications.
>
> No, it doesn't. Which applications are you talking about?
In any application where a tuple doesn't have all the attributes defined by the relation header. There are many such tuples in existance today. See Chapter 20 "Missing Information" in Date's Intro to Db Sys. Received on Mon Feb 23 2004 - 23:44:33 CET