Re: Surrogate Keys: an Implementation Issue

From: paul c <toledobythesea_at_oohay.ac>
Date: Tue, 01 Aug 2006 21:48:01 GMT
Message-ID: <l_Pzg.301627$iF6.177946@pd7tw2no>

JOG wrote:

> Brian Selzer wrote:
> [snip for brevity]

>> Not exactly. Any candidate key value is sufficient to identify a
>> proposition within a single database state, but that doesn't mean that it is
>> sufficient across multiple successive states. While it's true that if two
>> things are indistinguishible, they are the same thing, the reverse is not
>> necessarily true: it's not a caterpillar that emerges from a chrysalis, it's
>> a butterfly.

> 
> An interesting point - but what makes the caterpillar and the butterfly
> the same thing?

Can't put it succinctly, but I think it has something to do with sex.

p Received on Tue Aug 01 2006 - 16:48:01 CDT