El Lun 03 Nov 2003 17:00, scott.marlowe escribió:
> >
> > This is not quite what I need. I need to create a constraint to allow
> > only -one- of
> > company<->association<->default(=true) value
> > but any number of
> > company<->association<->default(=false) values
> >
> > I've tried many different ALTER TABLE ... CREATE CONSTRAINT variations,
> > all without success.
>
> Wouldn't a unique constraint on those three fields do this? Nulls don't
> violate unique constraints. Does that work, or did I miss too much of
> this conversation?
Scott, he want's to have as much falses as can be in the association field,
but only one true.
--
El mejor sistema operativo es aquel que te da de comer.
Cuida tu dieta.
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Martin Marques | mmarques@unl.edu.ar
Programador, Administrador | Centro de Telematica
Universidad Nacional
del Litoral
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