Portable phpMyAdmin
Portable phpMyAdmin is a WordPress plugin which allows a user to access the database section straight from the Dashboard using a portable phpMyAdmin installation.
If the user doesn’t know the MySQL credentials, the plugin extracts them straight from wp-config.php. This plugin requires PHP 5+.
The installation is straightforward. Upload the Portable phpMyAdmin plugin to your blog, activate it, then go to Tools | Portable PMA to use it.
Download it from WordPress plugin repository.