From: Sebastian Ritter <ritter.sebastian@gmail.com>
To: Andrew Sullivan <ajs@crankycanuck.ca>
Cc: pgsql-sql@postgresql.org
Subject: Re: Database normalization
Date: Tue, 28 Aug 2007 16:15:01 +0100
Message-ID: <99b656cb0708280815w141e715bhed5542317d709a17@mail.gmail.com> (raw)
In-Reply-To: <20070828145902.GB847@phlogiston.dyndns.org>
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<20070828145902.GB847@phlogiston.dyndns.org>
Hi,
On 8/28/07, Andrew Sullivan <ajs@crankycanuck.ca> wrote:
>
> On Tue, Aug 28, 2007 at 03:37:22PM +0100, Sebastian Ritter wrote:
> > Thanks for the information.
> >
> > Both tables would be exactly sames apart from the foreign key relation
> to
> > clients or services.
>
> Hmm. Are the services or clients tables different? A useful rule of
> thumb is that, to the extent you can sort things into "kinds of
> data", then you should have exactly one space for each one. (I hope
> that's clear.)
The table definition is exactly the same. The only difference is whether
the
row refers to a client or service.
> Another factor ive been considering is that one of the fields in this
> > table(s) definition(s) is free flowing text which could potentially
> become
> > very large. Should I take this in to
> > consideration when deciding whether to split the tables? In terms of
> > searching speed that is.
>
> I'd put it in its own table, probably, unless you're going to use it
> frequently.
Why would frequency of use change whether or not I use one or two tables?
Sebastian
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To: pgsql-sql@postgresql.org
Cc: ritter.sebastian@gmail.com, ajs@crankycanuck.ca
Subject: Re: Database normalization
In-Reply-To: <99b656cb0708280815w141e715bhed5542317d709a17@mail.gmail.com>
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