* andy > > > SELECT count(DISTINCT user_recommending) > > > FROM recommendations t > > > INNER JOIN geo.cities AS c ON t.city_id = c.ID AND > > > c.country_code = 'gm'
> I guess this is not an issue on the index. Explain select says it is using > the index. So I assume, that I did just write down the join syntax wrong. > MySQL is joining all 32000 records with the city table and then looks for > the country code. So this looks ok to me. Maybe I should > denormalize my data > and include the country code in the other table as well? Try selecting FROM the cities table and JOIN with the recommendations table. -- Roger sql --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
