Database Management Systems: Theory, Design and Real-World Applications

Database Management Systems: Theory, Design and Real-World Applications is a comprehensive academic guide for students who want to understand not only the foundations of database systems but also their practical use in modern technology environments. The book begins with the fundamentals of Database Management Systems, including the purpose of databases, limitations of file-based systems, data abstraction, database architecture, data models, and database languages. It then introduces the relational model and builds a strong conceptual base around relations, attributes, tuples, domains, schemas, keys, and integrity constraints. Readers are guided through essential SQL concepts, from database definition and data manipulation to intermediate SQL commands, transaction control, and database programming through PL/SQL. The book also explores database design through functional dependencies, normalization techniques, and Entity–Relationship modelling. Advanced and highly relevant topics such as transaction management, concurrency control, locking protocols, deadlocks, recovery mechanisms, timestamp ordering, optimistic concurrency control, and multiversion concurrency control are explained with clarity and practical relevance. With examples inspired by real-world systems such as banking, e-commerce, educational institutions, airlines, and social media platforms, this book helps learners connect classroom knowledge with real database applications. It is an ideal resource for BCA, B.Tech, MCA, Computer Science, Information Technology, and other undergraduate learners seeking a dependable foundation in DBMS.