The version of MySQL or MariaDB will be different, depending on whether or not you have a legacy hosting service or a new web hosting service.
Legacy Hosting services will have MySQL 5.6 available, and any new web hosting services will use MariaDB 10.2.
MariaDB is based on MySQL 5.7 and mostly backwards compatible. However, according to MariaDB’s documentation, there are some minor and usually inconsequential differences.
Can I change or upgrade the MySQL/MariaDB version?
Unfortunately, we won’t be able to change the version available on the server. If you’re on a legacy hosting service, you will need to upgrade to our new web hosting platform to take advantage of a newer MySQL version.