| From: | Alain <alainm(at)pobox(dot)com> |
|---|---|
| To: | Sql-Postgre <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: Does Postgresql have a similar pseudo-column "ROWNUM" as |
| Date: | 2005-05-17 17:48:49 |
| Message-ID: | 428A2E81.2060501@pobox.com |
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| Lists: | pgsql-php pgsql-sql |
Andrew Sullivan escreveu:
> On Thu, May 12, 2005 at 01:07:00PM -0600, Dennis(dot)Jiang(at)thomson(dot)com wrote:
>
>>Does Postgresql have a similar pseudo-column "ROWNUM" as Oracle? If
>>so, we can write the following query:
>
>
> No. What is the purpose of your query? You could use ORDER BY and
> LIMIT..OFFSET to do what you want. I think.
The problem is probably speed. I have done a lot of tests, and when
OFFSET gets to a few thousands on a multimega-recs database, it gets
very very slow... Is there any other to work around that?
Alain
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