Creating one
Open the Databases tab and choose New Database. The name must start with a letter and use only lowercase letters, digits and underscores.
Each database is created with its own user and a generated password. The password is shown once. Copy it into your application's configuration before you leave the page — it cannot be shown again, and the only remedy is to delete the database and create another.
Your databases are prefixed with your container's own identifier, so the name you see in the panel may be longer than the one you typed. Use the full name shown.
Connecting from your site
Use host localhost from inside your own container. A typical WordPress wp-config.php:
define( 'DB_HOST', 'localhost' );
define( 'DB_NAME', 'your_full_database_name' );
define( 'DB_USER', 'your_database_user' );
define( 'DB_PASSWORD', 'the password shown when you created it' );Remote access
Databases are reachable only from your own container. There is no remote MySQL access and no phpMyAdmin. This is deliberate: an internet-facing database is the single most common way a small site is compromised.
To work with your data, use a tool inside your site (for example Adminer uploaded to public_html and removed afterwards), or restore a backup locally.
Deleting
Deleting a database drops it and its user immediately and cannot be undone. Take a backup first if you are not certain — the Backups tab includes your databases.