Define RDBMS. Name any two RDBMS software.
Relational Database Management Systems (RDBMS) allow us to create a database consisting of relations. These systems enable users to store, retrieve, and manipulate data on the database through queries. They utilize query languages like SQL to access and manipulate data effectively.
There are many software applications that serve as RDBMS. Two prominent examples of RDBMS software are MySQL and Oracle. Other examples include Microsoft SQL Server and PostgreSQL. MySQL is specifically identified as an open-source RDBMS software.
Explanation
The answer defines RDBMS based on the text's description of creating databases with relations and managing data storage and retrieval. The examples are directly listed in the 'Introduction' section of the provided context.