Found it,
I now use
SELECT adreslog.adres,adreslog.totalread
,sum(case when linkcode='1012' AND linklog.adrescode=adreslog.alogid then 1
else 0 end ) as Homepage
,sum(case when linkcode='1234' AND linklog.adrescode=adreslog.alogid then 1
else 0 end ) as Mickey
FROM adreslog left join linklog on (adreslog.alogid = linklog.adrescode)
WHERE adreslog.mailcode='24120256'
group by adreslog.adres,adreslog.totalread;
Your comment about joining the tables helped.
Thanks !!
Kind regards,
Toon van Doorn
-----Oorspronkelijk bericht-----
Van: pgsql-php-owner@postgresql.org [mailto:pgsql-php-owner@postgresql.org]
Namens Frank Bax
Verzonden: dinsdag 4 oktober 2005 14:19
Aan: pgsql-php@postgresql.org
Onderwerp: Re: [PHP] Query takes much to long, is there a work around?
At 07:55 AM 10/4/05, Toon van Doorn wrote:
>Is there a faster way of selecting the hits on a link per adres?
This type of question (slow query) is usually asked on pgsql-sql list, it
has nothing to do with php.
You didn't mention indexes - surely you have indexes on your tables?
Check the output of "EXPLAIN ANALYSE" for one of your "select count ..."
subqueries.
I think your query will benefit from a multi-column index on ( mailcode,
linkcode, adrescode ), but 16 subselects and 51 rows in adreslog means over
800 subqueries being executed - that's a lot of work to do!!
What happens if you change
SELECT count(linkcode) FROM linklog WHERE linklog.mailcode='24120256' AND
linkcode='1012' AND linklog.adrescode=adreslog.alogid) as Homepage to
somthing like:
SELECT adrescode, mailcode, count(linkcode) FROM linklog WHERE
mailcode='24120256' AND linkcode='1012' as Homepage
then join to adreslog table.
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