Hi, this is the solution I came up with, that is over 10 times faster than my first attemps. Tested @31,871 entries in table 'picture' and 222,712 entries in table 'picture_attrib_rel'. Old Version: SELECT * FROM picture as p INNER JOIN picture_attrib_rel as pr1 ON (p.pid = pr1.pid) INNER JOIN picture_attrib_rel as pr2 ON (p.pid = pr2.pid and pr2.val_int < 1500) WHERE pr1.aid = 2 AND pr1.val_int >= 1500 AND pr2.aid = 5 AND pr2.val_int < 1000 Takes about 1.9 Seconds on average to return. The version with temporary tables: DROP temporary table if exists tmp_size; DROP temporary table if exists tmp_qi; CREATE temporary table tmp_size SELECT pid FROM picture_attrib_rel WHERE aid = 2 AND val_int >= 1500; CREATE temporary table tmp_qi SELECT pid FROM picture_attrib_rel WHERE aid = 5 AND val_int < 1000; SELECT pid,uid FROM tmp_size JOIN tmp_qi USING(pid) JOIN pictures USING(pid); DROP temporary table if exists tmp_size; DROP temporary table if exists tmp_qi; This takes 0.12 seconds to return, which is quite bearable for now. Thanks again for all your input! Regards, Jan -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
