For IONOS Web Hosting and Managed Server packages
phpMyAdmin is a web application used for the administration of MySQL and MariaDB databases, and it comes pre-installed in all IONOS web hosting packages that include at least one database. Once you've set up your database in your IONOS account, you will find a link that brings you right into phpMyAdmin to manage your database.
You have already created your database.
Changes you make in phpMyAdmin become active immediately and cannot be undone. Be especially careful with the Delete and Empty functions.