1. What is connection id? We will see this like "your mysql connection id is 12" when you enter into the mysql client programme. 2. Why will the connection id in mysql increase when you exit the mysql and login again? But I think the connection id should be cleared when user exit mysql. Thank you very much! -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]