Re: Natural keys vs Aritficial Keys
Date: Mon, 18 May 2009 17:18:50 GMT
Walter Mitty wrote:
> "paul c" <toledobythesea_at_oohay.ac> wrote in message
>> To most people, "natural" means "physical"
> That's not true in my experience. Most of the people I've dealt with tend
> to think a vehicle's VIN is a natural key, and a bank account's account
> number is a natural key. both of those entities are articificial to begin
> with, and therefore all their attributes are artificial. Still, your mileage
> may vary, if you've dealt with different people than I have.
Most people I know don't abstract at all. What's natural to them consists only of what they can see or have seen sometime, on a piece of paper or somesuch. Received on Mon May 18 2009 - 19:18:50 CEST