Re: Artificial Primary keys

From: Ben Clifford <>
Date: Mon, 28 Jan 2002 12:25:35 -0800
Message-ID: <>

--CELKO-- wrote:

> >> Or could you give an example - that is: of a natural key that holds
> information, but is immutable? <<

> DNA.
With organ transplants and the like, I wonder what potential there is for mutability here.

A sample of a person's DNA taken from (what you think is) their liver might not be the same as the DNA taken from their blood 6 years earlier, if the liver has been changed for a new one.

Ben Clifford  GPG: 30F06950
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Received on Mon Jan 28 2002 - 21:25:35 CET

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