Yes you can access PhpMyAdmin section for managing your WordPress site’s MySQL database direct from your WP admin area dashboard.
Portable PhpMyAdmin
Portable PhpMyAdmin is a WordPress plugin that makes this possible, it simply allows a user to access PhpMyAdmin section straight from his Dashboard.
In case user doesn’t know MySQL database credentials then this plugin extracts them from site’s wp-config.php file.
Usage: Install and activate the plugin, then visit Dashboard -> Tools -> Portable PMA and start using it.