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From: Jim C. Nasby <jnasby@pervasive.com>
To: Jaime Casanova <systemguards@gmail.com>
Cc: Craig A. James <cjames@modgraph-usa.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: update == delete + insert?
Date: Tue, 21 Mar 2006 05:23:48 -0600
Message-ID: <20060321112348.GE15742@pervasive.com> (raw)
In-Reply-To: <c2d9e70e0603201738s6664b1fci1717188cce834a39@mail.gmail.com>
References: <7F10D26ECFA1FB458B89C5B4B0D72C2B088286@sesrv12.wirelesscar.com>
	<441EC652.1010807@modgraph-usa.com>
	<441F3187.90506@modgraph-usa.com>
	<c2d9e70e0603201738s6664b1fci1717188cce834a39@mail.gmail.com>

On Mon, Mar 20, 2006 at 08:38:15PM -0500, Jaime Casanova wrote:
> On 3/20/06, Craig A. James <cjames@modgraph-usa.com> wrote:
> > Design 1:
> >    create table a (
> >      id integer,
> >      frequently_updated  integer);
> >
> >    create table b(
> >      id integer,
> >      infrequently_updated_1 integer,
> >      infrequently_updated_2 integer,
> >      infrequently_updated_3 integer,
> >      ... etc.
> >      infrequently_updated_99 integer);
> >
> > Design 2:
> >    create table c(
> >      id integer,
> >      frequently_updated  integer,
> >      infrequently_updated_1 integer,
> >      infrequently_updated_2 integer,
> >      infrequently_updated_3 integer,
> >      ... etc.
> >      infrequently_updated_99 integer);
> design 1 is normalized and better
> design 2 is denormalized and a bad approach no matter the RDBMS

How is design 1 denormalized?

> "What they (MySQL) lose in usability, they gain back in benchmarks, and that's
> all that matters: getting the wrong answer really fast."
>                            Randal L. Schwartz

Where's that quote from?
-- 
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461



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