Installation path: backend/admin/db_admin
Database-administration based on Adminer. "Adminer (formerly phpMinAdmin) is a full-featured database management tool written in PHP. Conversely to phpMyAdmin, it consist of a single file ready to deploy to the target server. Adminer is available for MySQL, PostgreSQL, SQLite, MS SQL and Oracle. Free for commercial and non-commercial use (Apache License or GPL 2)"
Additional there is a XML-Data-Import of previously exported XML-Dumps (via Adminer-Interface)
Download and extract the content of this package into backend/admin/database_adminer
Download adminer-x.x.x.php from http://www.adminer.org, rename it to adminer.inc and replace the old one (backend/admin/db_admin/adminer.inc)