Re: Using sequences in SQL text files

From: Richard Huxton <dev(at)archonet(dot)com>
To: HHB <hubaghdadi(at)yahoo(dot)ca>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Using sequences in SQL text files
Date: 2008-02-19 15:55:14
Message-ID: 47BAFBE2.4070407@archonet.com
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HHB wrote:
> Hi.
> I have sequence for each table in my database.
> In order to populate same data in the database, I created some SQL text
> files.
> ---
> insert into categories values (id value from sequence, '..', '...');
> insert into books values (id value from sequence, '..', '...', '..', fk to
> category id);

If they are of SERIAL type then they'll use their sequence by default:

INSERT INTO my_table (id, a, b) VALUES (DEFAULT, 'abc', 123);

Otherwise you can use the currval/nextval() functions:

INSERT INTO my_table (id, a, b) VALUES (nextval(<SEQUENCE-NAME>), 'abc',
123);

--
Richard Huxton
Archonet Ltd

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