Hi all,
I have a problem whith a very simple query. My problem is: it doesn't use indexes. It does full table scans instead. The only way I found to make it fast was using UNION. Can somebody please tell me, how I can make it fast (using indexes) without using UNION? My query: SELECT * FROM mytable WHERE fielda=1 OR fieldb=2 -The colums fielda and fieldb are offcourse indexed. -The table has about half a million rows. Faster is: SELECT * FROM mytable WHERE fielda=1 UNION SELECT * FROM mytable WHERE fieldb=2 Is there a way to make this fast on mysql 3.x as well? thanks in advance Gunnar --------------------------------------------------------------------- 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
