Re: Basic question?What 's the key if there 's no FD(Functional Dependencies)?

From: Godspeed <bl719293_at_bigpond.net.au>
Date: Wed, 01 Nov 2006 12:31:05 GMT
Message-ID: <ds02h.57077$rP1.33365@news-server.bigpond.net.au>

<saturnlee_at_yahoo.com> wrote in message
news:1162158876.794350.29460_at_f16g2000cwb.googlegroups.com...
> I have a basic question.
> Suppose there are 3 attributes: A,B and C.
> And there are no FD(trivial and non trivial )
>
> What 's the key for it? ABC or nothing???
>

It's either {ABC} or {D} where D is an artificial identifier (e.g. a sequence number). Received on Wed Nov 01 2006 - 06:31:05 CST

This message: [ Message body ]
Next message: Bob Badour: "Re: Basic question?What 's the key if there 's no FD(Functional Dependencies)?"
Previous message: Mike C#: "Re: FoxPro vs. SQL"
Next in thread: Bob Badour: "Re: Basic question?What 's the key if there 's no FD(Functional Dependencies)?"
Reply: Bob Badour: "Re: Basic question?What 's the key if there 's no FD(Functional Dependencies)?"
Maybe reply: Brian Selzer: "Re: Basic question?What 's the key if there 's no FD(Functional Dependencies)?"
Maybe reply: vldm10: "Re: Basic question?What 's the key if there 's no FD(Functional Dependencies)?"
Maybe reply: David Cressey: "Re: Basic question?What 's the key if there 's no FD(Functional Dependencies)?"

Contemporary messages sorted: [ by date ] [ by thread ] [ by subject ] [ by author ]

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US