Re: select query that uses a temporary table
Lorderon [EMAIL PROTECTED] wrote: Mabye, is there a way to tell MySQL to limit the temporary table up to 500 rows? so, when a row is matching into the top 500 rows, the last row will be dropped out (in case the table is on limit), and the new matched row will be inserted into the right place in the temporary table... To find out top 500 of 10,000 rows ordered by some criteria you anyway need to sort these 10,000 rows. :) -- For technical support contracts, goto https://order.mysql.com/?ref=ensita This email is sponsored by Ensita.net http://www.ensita.net/ __ ___ ___ __ / |/ /_ __/ __/ __ \/ /Egor Egorov / /|_/ / // /\ \/ /_/ / /__ [EMAIL PROTECTED] /_/ /_/\_, /___/\___\_\___/ MySQL AB / Ensita.net ___/ www.mysql.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
select query that uses a temporary table
Hi All, There's something that bothers me.. I have a query that uses a temporary table (has a necessary GROUP BY clause). The query also uses ORDER BY clause (necessary too). And I also use LIMIT clause. If the query finds 10,000 rows, then MySQL will insert 10,000 rows into the temporary table and sort, which makes the query very slow... :( Any suggestions on how can I speed it up? (I would be satisfied with the top 500 rows, no need in all the 10,000) Mabye, is there a way to tell MySQL to limit the temporary table up to 500 rows? so, when a row is matching into the top 500 rows, the last row will be dropped out (in case the table is on limit), and the new matched row will be inserted into the right place in the temporary table... -thanks, Lorderon. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
