From: D'Arcy J.M. Cain <darcy@druid.net>
To: Aaron Bono <postgresql@aranya.com>
Cc: Curtis@daycos.com
Cc: pgsql-sql@postgresql.org
Subject: Re: Table relationships
Date: Tue, 9 Jan 2007 10:30:33 -0500
Message-ID: <20070109103033.a55fcd53.darcy@druid.net> (raw)
In-Reply-To: <bf05e51c0701090713v1564455esc175cf3bb402393c@mail.gmail.com>
References: <031936836C46D611BB1B00508BE7345D04DC1BB5@gatekeeper.daycos.com>
<20070109094113.064bae02.darcy@druid.net>
<bf05e51c0701090713v1564455esc175cf3bb402393c@mail.gmail.com>
On Tue, 9 Jan 2007 09:13:35 -0600
"Aaron Bono" <postgresql@aranya.com> wrote:
> On 1/9/07, D'Arcy J.M. Cain <darcy@druid.net> wrote:
> > company <===> address <===> detail
>
> This approach implies that the address defines the relationship between a
> company and the detail (the other departments/offices). I cannot think of a
> business model that would use this though there probably are some...
Like the obvious one - companies have many places (departments) that
things are shipped to and details are things that are shipped.
> I'm not sure what this relationship is for. It would appear that a
> department can have different addresses for different companies.
Hmm. I guess I missed that. I'm just tossing out ideas here. Real,
in depth analysis would require an invoicable relationship. :-)
> There are many possibilities. Which one is best will depend on
> > analysing your particular business model.
>
> I agree whole heartedly. That is why I recommend starting with a logic
> structure before moving on to the physical.
Absolutely. Don't even think about the tables until you have mapped
out the business model.
--
D'Arcy J.M. Cain <darcy@druid.net> | Democracy is three wolves
http://www.druid.net/darcy/ | and a sheep voting on
+1 416 425 1212 (DoD#0082) (eNTP) | what's for dinner.
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To: pgsql-sql@postgresql.org
Cc: darcy@druid.net, postgresql@aranya.com, Curtis@daycos.com
Subject: Re: Table relationships
In-Reply-To: <20070109103033.a55fcd53.darcy@druid.net>
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