Database systems are integral to modern computing, providing a structured and efficient way to store, manage, and retrieve large volumes of data. At the core of any database system is a Database Management System (DBMS), which serves as the intermediary between the database (an organized collection of data, typically stored and accessed electronically via a computer system), its users, and applications. A DBMS enables the organization, storage, and manipulation of data, ensuring data integrity, security, and accessibility. This book attempts to understand the multiple branches that fall under the discipline of database systems and how such concepts have practical applications. It is compiled in such a manner that it will provide in-depth knowledge about the theory and practice of the field. In this book, constant effort has been made to make the understanding of the difficult concepts of database systems as easy and informative as possible, for the readers.