On Sun, May 05, 2002 at 03:21:59AM +0100, Donna Robinson wrote: > > explain select dances.danceid, dancetitles.title from dances, > dancetitles where dances.danceid=dancetitles.danceid and > dancetitles.title regexp "^A" and dances.has_desc='T' order by > title;
[snip] > This is TERRIBLE! But I can't figure out how to improve it. Can > anyone help? REGEXP queries don't use indexes. Change the: REGEXP "^A" to LIKE "A%" and it'll use the index and give you a nice speed boost. Jeremy -- Jeremy D. Zawodny, <[EMAIL PROTECTED]> Technical Yahoo - Yahoo Finance Desk: (408) 349-7878 Fax: (408) 349-5454 Cell: (408) 685-5936 MySQL 3.23.47-max: up 86 days, processed 2,253,903,006 queries (301/sec. avg) --------------------------------------------------------------------- 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
