Re: On Normalisation & the State of Normalisation
From: Nicola <nvitacolonna_at_gmail.com>
Date: Thu, 05 Feb 2015 15:05:03 +0100
Message-ID: <nvitacolonna-3D5CF4.15050205022015_at_freenews.netfront.net>
Date: Thu, 05 Feb 2015 15:05:03 +0100
Message-ID: <nvitacolonna-3D5CF4.15050205022015_at_freenews.netfront.net>
In article <a5e28036-efef-4cc8-991a-6b2235aad917_at_googlegroups.com>, Jan Hidders <hidders_at_gmail.com> wrote:
> > 1. The developer declares that the proposed extension satisfies 5NF. Is
> > that correct ? If not, please state why, which NF is breaks, any errors
> > that it may have, etc. A few words will suffice. I expect minimal
> > discussion, but don't let me stop you.
>
> Yes, it is in 5NF. But it is not dependency preserving.
Which dependencies are not preserved? With respect to what schema?
Nicola
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