Re: Can we solve this -- NFNF and non-1NF at Loggerheads

From: <lauri.pietarinen_at_atbusiness.com>
Date: 7 Feb 2005 08:20:30 -0800
Message-ID: <1107793230.717306.130550@g14g2000cwa.googlegroups.com>

Alan wrote:

"the value of any attribute in a tuple must be a single value from the domain of that attribute"

Please read carefully the above snip from your quotation.

If the domain in question happens to be the {set of all fingerprints} or
the {set of all blueprints for jumbo jets}, then, indeed, without violating this restriction in any way we can save, in one attribute, a *single* fingerprint (but not two) or a *single* jumbo jet blueprint (but not two).

Technically, a domain could consist of relation values, so then we would have RVAs within the same framework, but I am not going to go that far...

regards,
Lauri Pietarinen Received on Mon Feb 07 2005 - 10:20:30 CST