Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Usenet -> comp.databases.theory -> Re: Why spurious tuples with fifth normal form?

Re: Why spurious tuples with fifth normal form?

From: Jan Hidders <jan.hidders_at_REMOVETHIS.pandora.be>
Date: Thu, 16 Jun 2005 19:13:39 GMT
Message-ID: <Dbkse.122681$kp7.6954108@phobos.telenet-ops.be>


stowellt_at_gmail.com wrote:
> Out of curiousity, I have seen data sets where
> there is a join dependency due to a cyclic constraint, but I'm not sure
> what exactly constitutes a cyclic constraint. I thought my dataset had
> one, but apparently not. How does one go about determining a cyclic
> constraint?

Do you want to know how to recognize if a certain join dependency holds, or do you want to know how to check if a certain JD that you found is cyclic? But first, perhaps, is it precisly clear to you what a JD is?

Received on Thu Jun 16 2005 - 14:13:39 CDT

Original text of this message

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