MySQL
MySQL is an open-source relational database management system (RDBMS)
MySQL is an open-source relational database management system (RDBMS) that runs as a server providing multi-user access to several databases. It is a multi-user, multi-threaded server which implements as a client-server application
MySQL is the most popular open-source database system in the world. MySQL is often compared to other open-source database systems: PostgreSQL, MariaDB, and MongoDB; and commercial database systems: Microsoft SQL Server and Oracle Database.