Table structure?

[Joakim Schramm]

> -----Original Message-----
> From: valentina-bounces at lists.macserve.net 
> [mailto:valentina-bounces at lists.macserve.net] On Behalf Of 
> Ruslan Zasukhin
> Sent: 29 April 2006 00:11
> To: valentina at lists.macserve.net
> Subject: Re: Table structure?
> 
> On 4/29/06 1:04 AM, "Joakim Schramm" <joakim at astrocalc.com> wrote:
> 
> > Country has Places
> >    1          M
> > Country has Zones
> >    1          M
> > Places  has Zone(s)
> >    M           1
> > 
> >    /--T1 
> >   /   |
> > T0    |-- Result
> >   \   |
> >    \--T2
> > 
> > In words it's like, a place is located in country (we know), most 
> > country has normally just one zone but some has many. Each place is 
> > located in 1 of countries zones. App lookup place and get 
> country and 
> > which zone in country it's located. Each Zone has different 
> DateTimes 
> > for change of zone hour, in relation to GMT (=0) if not SDT.
> > 
> > Is it understandble?
> 
> Yes, now we talk on natural language of humans! :-)
> 
>     you have 3 Tables and 3 links between them
> 
>     so you need 3 Tables and 3 BinaryLinks between them.
> 
> Agree?
> 
Yes I think so :-) Just see if I have got it right by study examples.

Country.CountryID Link Places.Place
Country.CountryID Link TimeZones.Ptr_Country
Places.Country    Link TimeZones.Ptr_Country

Is that correct?

Joakim
> --
> Best regards,
> 
> Ruslan Zasukhin
> VP Engineering and New Technology
> Paradigma Software, Inc
> 
> Valentina - Joining Worlds of Information http://www.paradigmasoft.com
> 
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