Re: ID field as logical address
Date: Wed, 3 Jun 2009 17:54:24 -0700 (PDT)
On Jun 3, 11:20 pm, "Walter Mitty" <wami..._at_verizon.net> wrote:
> "David BL" <davi..._at_iinet.net.au> wrote in message
> news:2196de54-5f7f-49d8-83f2-408be72f7576_at_q37g2000vbi.googlegroups.com...> On May 29, 8:54 pm, "Walter Mitty" <wami...@verizon.net> wrote:
> >> Now, if we update the LastName, the FirstName, and the Phone number of an
> >> entry, it's still the same entry, because the ID field retains the same
> >> value.
> > That's rather fuzzy until you say what you mean by 'entry'. Does it
> > mean value or variable? It cannot be referring to the tuple because
> > after the update it is a different tuple. Evidently 'entry' means
> > 'variable' in the above. Substitute and you will see it makes sense.
> In the above, "entry" means the row that contains the value.
In the RM there is no such thing as a row that contains a value. Paul was right when he suggested you were thinking about tables not relations. Received on Thu Jun 04 2009 - 02:54:24 CEST