| From: | Magnus Hagander <magnus(at)hagander(dot)net> |
|---|---|
| To: | Samantha Atkins <sjatkins(at)mac(dot)com> |
| Cc: | rod(at)iol(dot)ie, Reg Me Please <regmeplease(at)gmail(dot)com>, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: How to create primary key |
| Date: | 2007-11-06 09:57:00 |
| Message-ID: | 20071106095700.GC32607@svr2.hagander.net |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
On Tue, Nov 06, 2007 at 01:38:31AM -0800, Samantha Atkins wrote:
>
> On Nov 6, 2007, at 1:15 AM, Raymond O'Donnell wrote:
>
> >On 06/11/2007 08:54, Reg Me Please wrote:
> >
> >>What'd be the syntax to create a primary key on an already build
> >>table?
> >
> >ALTER TABLE test ADD CONSTRAINT test_pk PRIMARY KEY (f1);
> >
>
> So, ALTER TABLE test ADD PRMARY KEY(f1 [, ... ] )
> isn't enough? It appears in the examples. What more does the
> explicit test_pk do that wouldn't happen anyway?
It's not needed. It gives a name to the primary key. If you don't specify
one, the system will pick one for you automatically.
//Magnus
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