Re: MV Keys
From: Jon Heggland <heggland_at_idi.ntnu.no>
Date: Thu, 2 Mar 2006 17:14:19 +0100
Message-ID: <MPG.1e7138422b607c1d989777_at_news.ntnu.no>
Date: Thu, 2 Mar 2006 17:14:19 +0100
Message-ID: <MPG.1e7138422b607c1d989777_at_news.ntnu.no>
In article <1141311212.487197.167020_at_t39g2000cwt.googlegroups.com>,
jog_at_cs.nott.ac.uk says...
> To me this highlights the difference between 1-NF and further
> normalization. The RM is based on a functional mapping of column names
> to values. If a relation is not in 1-NF its tuples cannot be modelled
> functionally, and this being the core of RM, it is definitional as
> opposed to just mere convenience.
The functional mapping is retained if you accept that a relation value can be considered a (single) value.
-- JonReceived on Thu Mar 02 2006 - 17:14:19 CET