From: | Gavin 'Beau' Baumanis <gavinb(at)eclinic(dot)com(dot)au> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org |
Subject: | Add a ROWCOUNT to the output of a select. |
Date: | 2008-05-13 23:54:43 |
Message-ID: | 79F4289B-AF23-4D59-9C89-4D5B6D74706B@eclinic.com.au |
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Thread: | |
Lists: | pgsql-sql |
Hi Everyone,
After spending some time searching through our good friend Mr. Google
and the mailing list I found a post that provided me with a query that
does just what I need.
However, the query takes FOREVER and although this is stated in the
original mail I thought I would ask if there was any advice that you
might be able to provide to speed things up a little.
And while the query does return over 27,000 rows in my case, I didn't
expect it to take 9 minutes and 11 seconds!
Please find the query below - and of course - thanks in advance for
any assistance you might be able to provide me with!
select
(select
count(*)
from
myTable as myCount
where
myCount.contactdate <= myTable.contactdate
) as rownum,
contactdate
from
myTable
where
contactdate > '2007-06-30 23:59:59'
order by
contactdate;
-Gavin
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