A Relational Database Management System (RDBMS) is a software tool that helps users store, manage, and retrieve data in a structured way. It organizes data into tables, which consist of rows and columns, making it easy to understand and manipulate. Each table can represent different entities, such as customers, orders, or products, and relationships between these tables can be established using keys.
RDBMSs use a language called SQL (Structured Query Language) to perform operations like adding, updating, or deleting data. Popular examples of RDBMS include MySQL, PostgreSQL, and Oracle. These systems ensure data integrity and support multiple users accessing the database simultaneously.