Inserting into a unique constraint/ index

What is the SQL syntax for inserting a value into the column with a unique index/ constraint?

I've been suggesting using nextval, but don't have any details on this.

ie. INSERT into Company (company_id, name, address)

VALUES (56, some Company, 555 malibu dr.)

this gives a parent key violated error.

In article <37CD0E1C.78F9_at_yahoo.com>,
  connor_mcdonald_at_yahoo.com wrote:
> Richard Gaston wrote:
> >
> > I think unique constraints are implemented as
unique indexes in oracle.
> > Oracle will create a unique index for the
column(s) you declare unique in a
> > constraint. So apparently, there's no real
difference between the two.
> >
> > As to why you'd prefer one over the other, I
don't know. Taste?
> >
> > Michael Hjorth <michael_hjorth_at_my-deja.com>
wrote in message
> > news:7q2vo5$c0g$1_at_nnrp1.deja.com...
> > > What is the functional difference between a
unique index and a unique
> > > constraint?
> > > I know the latter has a constraint as well
as the index, but apparently
> > > it enforces the same restrictions on the
database as the unique index.
> > > Or did I get it wrong?
> > > Why would I prefer one over the other in a
particular case?
> > >
> > > Thank you for any comments.
> > >
> > > Michael.
> > >
> > >
> > > Sent via Deja.com http://www.deja.com/
> > > Share what you know. Learn what you don't.
>
> It is possible to implement a unique constraint
with a NON unique index
> in 8.1, thus making them different...
>
> Also with unique constraints you can make them
deferrable and other nice
> things that cannot be done with a unique index.
>
> Cheers
>
> --
> ===========================================
> Connor McDonald
> "These views mine, no-one elses etc etc"
> connor_mcdonald_at_yahoo.com
>
> "Some days you're the pigeon, and some days
you're the statue."
>

Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't. Received on Tue Sep 14 1999 - 12:07:39 CDT