----- Original Message -----
From: "James Harvard" <james.lists.tech@stripped>
Sent: Wednesday, December 21, 2005 9:08 PM
Subject: Re: Are primary keys essential?
> Thanks the on & off-list replies, but I obviously didn't explain my
> situation very well!
> My app is essentially creating summary reports from large amounts of data.
> It is _not_ doing the actual data warehousing. It's international trade
> The data tables contain foreign keys for stuff like destination country,
> trade commodity category etc., but they are _not_ themselves referenced by
> any other table. Therefore I have not yet found, nor do I envisage
> finding, any use for an arbitrary auto_increment primary key. So why
> would/might I need a PK at all?
Well, if this is _just_ summary data, I suppose it's okay to get along
without PKs. But I've never had much to do with the theory and practice of
data warehouses beyond a few very basic concepts so I wouldn't take that to
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