MariaDB is a fork of MySQL.
The database structure and indexes of MariaDB are the same as MySQL. This makes MariaDB a backward compatible, drop-in replacement for MySQL.
We currently run MariaDB version 10.2.29
To check the version of MariaDB:
Head to Manage Hosting, then phpMyAdmin.
Select the database in the left-hand panel.
Select the Query tab at the top.
Type the query: SELECT VERSION(); and select Go.
The version of MariaDB will then be outputted.