PhpMiniAdmin

phpminiadmin is an extremely lightweight alternative to heavy phpMyAdmin for quick and easy access MySQL databases.

Instead of installing huge phpMyAdmin (~11Mb) and trying to figure out how to use all it's features, just upload one ~10Kb file and it's ready to use!
 * then access it via the browser (ex. http://yoursite.com/phpminiadmin.php)
 * script will ask you for DB login/pwd
 * after successfull db login you will see area where you able to enter any SQL commands (select, update, insert, etc.)
 * even if you don't know SQL it's still easy to manage tables in DB, export and import data using 'quick links' on the top bar.

And due to it's simplicity script really fast and need just a little server resources! (your hosting provider will be glad ;)
 * Website: http://phpminiadmin.sourceforge.net/