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_at_posting.google.com>
Date: 7 Oct 2002 08:09:52 -0700
Message-ID: <c0d87ec0.0210070709.47fcdf95_at_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 - 17:09:52 CEST