Re: One to One relationships
From: Diego Berge <dberge_at_privacy.net>
Date: Mon, 19 May 2003 12:11:40 +0300
Message-ID: <baa74e$qpga9$1_at_ID-186969.news.dfncis.de>
>>> time of their birth. I don't claim that it's a practical system.
>>
>>I think that's a good idea. But then what do you think of fingerprints?
>
> There are two problems with fingerprints. [....]
Date: Mon, 19 May 2003 12:11:40 +0300
Message-ID: <baa74e$qpga9$1_at_ID-186969.news.dfncis.de>
Bernard Peek wrote:
> In message <46e627da.0305070647.2c2b84a8_at_posting.google.com>, AK > <ak_tiredofspam_at_yahoo.com> writes>>> natural key for people; the precise latitude, longitude, altitude and
>>>
>>> In general there isn't a good natural key to identify people, that's why
>>> most databases use various surrogates (like SSN.) I've proposed a
>>> time of their birth. I don't claim that it's a practical system.
>>
>>I think that's a good idea. But then what do you think of fingerprints?
>
> There are two problems with fingerprints. [....]
Three problems. The third being that fingerprints can change; for example, because of cuts or burns to the fingers, not to mention a whole hand being chopped off.
Regards,
Diego Berge.
-- e-mail address invalid. Please reply to newsgroups.Received on Mon May 19 2003 - 11:11:40 CEST