Hello.
This is a good start point: http://dev.mysql.com/doc/mysql/en/mysql-optimization.html Sebastian <[EMAIL PROTECTED]> wrote: > i have a table with several thousand records. i want to know if adding > an index will improve things, example: > > ------------------------------------- > | id | item | text | runtime | dateline > ------------------------------------- > > now say i create this query: > > $stats = mysql_query(" > SELECT COUNT(*) as total, AVG(runtime) as avgtime > FROM table WHERE dateline > ".strtotime('6 hours ago')." > "); > > should dateline be an index? > basically, i would like to know when i should create an index, when an > index is not needed, and what columns should be indexes.. > > any urls which explains all this would be helpful. > -- For technical support contracts, goto https://order.mysql.com/?ref=ensita This email is sponsored by Ensita.NET http://www.ensita.net/ __ ___ ___ ____ __ / |/ /_ __/ __/ __ \/ / Gleb Paharenko / /|_/ / // /\ \/ /_/ / /__ [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]
