Re: Replacement for Oracle's "ROWNUM" in Postgres

Thanks guys for the answer !
The sequence solution works perfect for me.
Using OIDs is not the best solution, because I expect a sequence running
from 1 to the nr. of updated rows.
BTW, the 1..n sequence should have rang a bell...

Thanks again,
Csaba.


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Von: pgsql-general-owner@postgresql.org
[mailto:pgsql-general-owner@postgresql.org]Im Auftrag von Shridhar
Daithankar
Gesendet: Freitag, 20. Dezember 2002 08:32
An: 'pgsql-general'
Betreff: Re: [GENERAL] Replacement for Oracle's "ROWNUM" in Postgres


On 19 Dec 2002 at 11:30, Bill Gribble wrote:

> On Thu, 2002-12-19 at 10:58, Csaba Nagy wrote:
> > This query is setting a date into a column for all the rows, starting
with a
> > fixed date with 10 minutes intervals.
> >
> > UPDATE some_table
> > SET some_date_column = 'some_literal_date' + (ROWNUM / 144.0);
> One way:
>
> CREATE SEQUENCE dateseq;
>
> UPDATE some_table
> SET some_date_column = 'some_literal_date' +
>                        (nextval('dateseq') / 144.0)
>
> DROP SEQUENCE dateseq;

Or use OID..

Bye
 Shridhar

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