An RDBMS (Relational Database Management System) is software that stores data in tables made of rows and columns. Each table represents a specific entity (like students or products), and relationships can be created between them using keys.
It uses SQL (Structured Query Language) to manage, query, and manipulate data. RDBMS enforces data integrity through constraints like PRIMARY KEY, FOREIGN KEY, and NOT NULL. It follows the ACID properties (Atomicity, Consistency, Isolation, Durability) to ensure reliable and secure transactions.