Re: [ADMIN] Primary key

From: Richard Broersma Jr <rabroersma(at)yahoo.com>
Date: Wed Sep 19 2007 - 11:26:15 EDT

• Carol Walter <walterc@indiana.edu> wrote:

> Does postgres allow compound or composite keys for primary keys? I
> thought I read someplace that it didn't. Now, I can't find a
> reference to it.

It does. composite key are defined as a table constraint: http://www.postgresql.org/docs/8.2/interactive/sql-createtable.html

This link illistrates syntax with this example:

CREATE TABLE films (

    code        char(5),
    title       varchar(40),
    did         integer,
    date_prod   date,
    kind        varchar(10),
    len         interval hour to minute,

    CONSTRAINT code_title PRIMARY KEY(code,title) );

Regards,
Richard Broersma Jr.

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TIP 2: Don't 'kill -9' the postmaster Received on Wed Sep 19 11:28:29 2007