WP-DBManager allows you to optimize database, repair database, backup database, restore database, delete backup database , drop/empty tables and run selected queries. Supports automatic scheduling of backing up and optimizing of database. You can manage your database from your WordPress admin panel. The installl instructions need to be followed to make sure the back folder is secure.
More Info: http://lesterchan.net/wordpress/readme/wp-dbmanager.html
There is a WP-DBManager video at : http://www.tubetorial.com/wordpress-database-optimization/