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Re: relationship diagram

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From Helpful Harry <HelpfulHarry@BusyWorking.com>
Newsgroups comp.databases.filemaker
Subject Re: relationship diagram
Date Mon, 21 Oct 2013 09:11:19 +1300
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In article <ca10e$5263ae19$b254464b$3192@cache90.multikabel.net>, E.
Appeldoorn <ursus.kirk@ziggo.nl> wrote:
> JayBee schreef op 20-10-2013 00:29:
> > Hello
> > I'm using FMProAdvanced11 version 3.
> >
> > I was reading an article on designing a relational databases recently and
> > normalisation.  I think it described normalising a database to 3rd normal
> > form.  It said that you must not have any many to many to many
> > relationships and you must correct this by adding a new entity in between
> > the many to many relationship.
> > When I checked the relationship diagram for my company's database in
> > FMPro11 there seemed to be quite a lot of many to many relationships in
> > there .
> >
> >
> > How bad is this?  Our database works as we need it to.
> >
> >
> > Does anybody know what this actually means in practice?
> >
> > Many Thanks
> 
> Jenny,
> 
> Although I understand what they are trying to do, you shouldn't be 
> overly concerned about what others are saying. If your current set up 
> works and you understand why it works then by all means keep it that 
> way. In all my databases I have only one that got so cluttered that I 
> had to rebuild (and use multiple occurances for the same table), but all 
> the others have simple many-2-many relationships. (also referred to as a 
> spider-graph)

I haven't used the newer versions of FileMaker with the (rather silly)
relationship diagram, but as far as I understand it that diagram simply
shows the relationship links - it doesn't, and can't, tell you whether
they are one-to-one, one-to-many, many-to-one, or many-to-many. That
type of relationship information can only be known by what data and
records each table has.

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relationship diagram JayBee <Jennifer_Beecroft@hotmail.com> - 2013-10-19 15:29 -0700
  Re: relationship diagram Martin Ī¤rautmann <t-usenet@gmx.net> - 2013-10-20 04:34 +0000
  Re: relationship diagram "E. Appeldoorn" <ursus.kirk@ziggo.nl> - 2013-10-20 12:19 +0200
    Re: relationship diagram Helpful Harry <HelpfulHarry@BusyWorking.com> - 2013-10-21 09:11 +1300
      Re: relationship diagram "E. Appeldoorn" <ursus.kirk@ziggo.nl> - 2013-10-21 10:54 +0200

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