From zlmei@hotmail.com Mon, 14 May 2001 15:24:37 -0700 From: "Guang Mei" Date: Mon, 14 May 2001 15:24:37 -0700 Subject: SQL statement performance Message-ID: MIME-Version: 1.0 Content-Type: text/plain Oracle : 8.0.5 Platform : Sun SQL statement: select distinct(spid) spid, name, commonname from ( select distinct queryspid spid from results union select distinct subjspid spid from results ) a, species where a.spid=species.id ; Table "Species" only has 33 records, while table "results" has about 8000000 records. There are indexes on queryspid and subjspid. This query is somehow slow. Is there any "easy" way to speed it up? Thanks. _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Guang Mei INET: zlmei@hotmail.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru@fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).