Plotalot can retrieve chart data from external databases using a range of database drivers provided by Joomla. Drivers provided by Joomla include MySql, Oracle, Postgre, MS Sql, and Sqlite. These drivers in turn depend on PHP extensions and/or other software that may or may not be available on your server platform.
The database configuration interface in Plotalot shows a list of database drivers installed and attempts to determine their support status on your server.
The Joomla site that Plotalot is installed on must be running on a MySql or MariaDB database.