Re: Meaning of 1:1, 1:1 generalization, 1:n, 1:n non identifying, n:m

"mAsterdam" <mAsterdam_at_vrijdag.org> wrote in message news:415d36e5$0$43451$e4fe514c_at_news.xs4all.nl...
>> Joshua Beall wrote:
>> I've been taking a look at DB Designer 4,, and looking through the
>> documentation (http://www.fabforce.net/dbdesigner4/doc/index.html) I am a
>> little unclear on some of their nomenclature:
>>
>> '1:1' - Ok, one to one. Got it.
>> '1:1 generalization' - Don't know this. Obviously different somehow from
>> one to one, but how?
>> '1:n' - One to many, I assume.
>> '1:n non identifying' - Nonidentifying? What does this mean?
>> 'n:m' - Many to many? Again, not sure.
>
> Your question boils down to:
> "What do these mean in the context of that product".
> There are forums at the vendors website.
> Your chances of getting an answer are much better there.

I actually did post to their forums, but from the way it is talked about in the documentation, I got the idea that these terms are general database terms that you should understand *before* using their product. This is why they don't bother to explain them, they just say "the common relationships (insert list) can be accessed via these buttons." I have looked through the documentation and was not able to find any further description of these terms.

And nobody on their forums has responded yet. It's only been about 12 hours, though.

  -Josh Received on Fri Oct 01 2004 - 14:14:17 CEST