Subject RE: [ib-support] One-to-one relationship
Author Nico Callewaert
Thanks Dietrich


-----Oorspronkelijk bericht-----
Van: Dietrich Schulten [mailto:ibo@...]
Verzonden: woensdag 16 mei 2001 9:16
Onderwerp: Re: [ib-support] One-to-one relationship

Hi Nico,

"Nico Callewaert" <ncw@...> schrieb:

> Hi list,

> Can someone explain to me what is the advantage of a one-to-one
> relationship ? I don't see any advantage on it, because a single record
> the first table is related to only one record in the second table, so why
> don't put it all in one table then ?

For instance, if you have a subtype-kind of relationship, it makes sense
to have the supertype in one table and the additional attributes of the
subtype in a second, dependent table that relates 1:1 to the first.


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