Note: You are currently viewing documentation for Moodle 3.6. Up-to-date documentation for the latest stable version of Moodle is likely available here: Oracle.
Moodle will technically work on Oracle, as it's supported by our database framework and it passes our basic unit testing.
However, we do not recommend it for any new installations because it is generally slow, and hardly any Moodle developers use it for development.
Unless you are being forced somehow to use Oracle, we recommend Postgres or MariaDB for new Moodle installations.