Database Theory is a branch of computer science that deals with the design, implementation, and management of databases. Coursera's Database Theory catalogue provides a comprehensive understanding of the fundamental concepts of databases. You'll learn about data models, normalization, SQL queries, transaction management, and various database systems such as Relational, NoSQL, and Distributed databases. You'll also gain insights into database security, integrity, and performance optimization. This invaluable knowledge equips you to design robust and efficient databases for different business needs, and prepares you for roles such as Database Administrator, Database Designer, and Data Analyst.