You need to create a Sequense.
CREATE SEQUENCE NEXTID START WITH 1 INCREMENT BY 1 MINVALUE 1 CACHE 20
NOCYCLE ;
then do a select SQL like
select nextid.nextval in to a variable from dual;
then use the variable in your insert.
you also could say
INSERT into Company (company_id, name,address)
VALUES (nextid.nextval, some Company, 555 malibu dr.)
adholaki_at_my-deja.com wrote in message <7rlvck$qp8$1_at_nnrp1.deja.com>...
>What is the SQL syntax for inserting a value into
>the column with a unique index/ constraint?
>
>I've been suggesting using nextval, but don't
>have any details on this.
>
>
>ie. INSERT into Company (company_id, name,
>address)
>
>VALUES (56, some Company, 555 malibu dr.)
>
>this gives a parent key violated error.
>
>
>
>
>
>In article <37CD0E1C.78F9_at_yahoo.com>,
> connor_mcdonald_at_yahoo.com wrote:
>> Richard Gaston wrote:
>> >
>> > I think unique constraints are implemented as
>unique indexes in oracle.
>> > Oracle will create a unique index for the
>column(s) you declare unique in a
>> > constraint. So apparently, there's no real
>difference between the two.
>> >
>> > As to why you'd prefer one over the other, I
>don't know. Taste?
>> >
>> > Michael Hjorth <michael_hjorth_at_my-deja.com>
>wrote in message
>> > news:7q2vo5$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 - 22:02:23 CDT
