Re: How do you create a double-primary key?

Thanks.
Very clear and very effective.
Bye
Francesco

"Howard J. Rogers" <howardjr_at_www.com> wrote in message news:39c7f83f_at_news.iprimus.com.au...
> What you're saying is that the combination of ID1 and ID2 is the primary
 key
> on this table. That's a concatentated primary key, and is easily done
 with
> the alter table command
>
> Alter table xxxx
> Add (Constraint <name> Primary Key (ID1,ID2) )
> deferrable initially immediate
> Using Index
> Tablespace indx01
>
> Key things: ignore the 'deferrable' line if you don't have Oracle 8 or
> above.
> Always house the index that will be automatically created for you when you
> declare a primary key in the appropriate index tablespace.
>
> Regards
> HJR
> --
> --------------------------------------------------------------------------
> Opinions expressed are my own, and not those of Oracle Corporation
> Oracle DBA Resources: http://www.geocities.com/howardjr2000
> --------------------------------------------------------------------------
>
>
>
> "Francesco Marchioni" <Francesco.Marchioni_at_intra.lastminutetour.com> wrote
> in message news:8q7ruq$g9o$1_at_marte.lastminutetour.com...
> > Hello,
> > I'd like to know how can I create a table with a double primary key?
> > I mean I have two keys
> >
> > ID1 ID2
> >
> > and it's legal to have duplicates of ID1 or duplicates of ID2 but not of
 ID1
> > and ID2 together.
> > Example:
> >
> > ID1 ID2
> > 1 5 Ok
> > 1 4 Ok
> > 3 4 Ok
> > 1 5 Wrong. I don't want to allow this!
> >
> > Does anybody know how to do it?
> > Thanks
> > Francesco
> >
> >
>
>
Received on Wed Sep 20 2000 - 00:00:00 CDT