From: | Bruno Wolff III <bruno(at)wolff(dot)to> |
---|---|
To: | Mike Mascari <mascarm(at)mascari(dot)com> |
Cc: | MT <m_tessier(at)sympatico(dot)ca>, GENERAL <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: How many fields in a table are too many |
Date: | 2003-06-26 11:31:42 |
Message-ID: | 20030626113142.GA6568@wolff.to |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
On Thu, Jun 26, 2003 at 01:02:06 -0400,
Mike Mascari <mascarm(at)mascari(dot)com> wrote:
> > Hi,
> >
> > Just a quick question, not unrelated to my
> > previous question, which I don't think will
> > get answered. I have a table with 13 fields.
> > Is that too many fields for one table.
>
> Mathematically, a binary relation represents the relevant cross
> product of two domains, x and f(x):
A binary relation is a subset of the cross product of two sets.
This is more general than using x and f(x) since this implies some
restrictions on the subset (namely that there is only one tuple
with a specific member of x in the x part of the tuple).
From | Date | Subject | |
---|---|---|---|
Next Message | Bruno Wolff III | 2003-06-26 11:37:52 | Re: Question regarding performance (large objects involved) |
Previous Message | Matt Browne | 2003-06-26 11:00:07 | Foreign keys |