Please, review the list of registered MySQL databases. MySQL is an open source relational database management system (RDBMS) that relies on SQL for processing the data in the database. MySQL provides APIs for the languages C, C++, Eiffel, Java, Perl, PHP and Python. A relational database stores data in separate tables rather than in one big table. A database management system allows you to add, access, and process data stored in a SQL database.