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Re: Primary-key ... alternate key ... (newbie question)

From: --CELKO-- <71062.1056_at_compuserve.com>
Date: 7 Oct 2002 08:09:52 -0700
Message-ID: <c0d87ec0.0210070709.47fcdf95@posting.google.com> 





>> The attributes shall be depend of ALL the key's Nothing else than

ALL the key's? <<



That is Chris Date's short description of Third Normal Form (3NF). The
actual quote is "the key, the whole key and nothing but the key" which
is a parody of the oath that witnesses take in a trial in the United
States  -- "Do you swear to tell the Truth, the whole Truth and
nothing but the Truth, so help you God?"



Chris has a short piece at www.dbdebunk.com on primary keys and how to
pick them.
Received on Mon Oct 07 2002 - 10:09:52 CDT












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