¿The book covers fundamental concepts such as data, information, metadata, and database. It explains the differences between these terms and how they are interconnected. ¿The book explores the characteristics of a database system and its benefits, such as data independence, data security, and efficient data access. ¿The book covers the entity-relationship data model, which is a widely used modelling technique for designing relational databases. It explains the concepts of entities, attributes, and relationships. ¿The book describes the importance of maintaining data integrity in a database system and explains how to enforce integrity rules and constraints. ¿The book covers ER modelling, explains how to create an ER diagram and explores the concept of functional dependencies and how they are used in database design. ¿The book covers SQL's data manipulation language, which includes statements used for inserting, updating, and deleting data in a database. ¿This book is intended for computer science majors and the study matter lays special emphasis on designs issues, relational calculus, mathematical models and relational algebra.