Hi All, We use Vbulletin for our message boards, and I have a query which takes approximately 1.2 - 1.5 seconds to execute, on a table ('thread') having around 130,000 rows, it is as follows
SELECT threadid FROM thread AS thread LEFT JOIN deletionlog AS deletionlog ON ( thread.threadid = deletionlog. primaryid AND TYPE = 'thread' ) WHERE forumid =98 AND sticky =0 AND visible =1 AND deletionlog.primaryid IS NULL ORDER BY sticky DESC , lastpost DESC LIMIT 0 , 15 There is an index on the field 'lastpost' ( Type: INT(10) ) , also Explain Select gives me this...... id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE thread index *NULL* lastpost 4 *NULL* 112783 Using where 1 SIMPLE deletionlog eq_ref PRIMARY PRIMARY 5 foxbox16.thread.threadid,const 1 Using where; Using index; Not exists I am no SQL guru so can somebody kindly help me to optimize this query so that it could run faster , as during peak times this slows the DB down a lot.......... Kishore Jalleda