The principles which form the basis for the broad analysis of this book includes Database design methodology considered as structured approach.It uses procedures, techniques, tools, and documentation aids to support and facilitate the process of Database design. This book explores and and analyses the various methodologies with practical examples. This includes three main phases, which are conceptual, logical and physical database design. Chapter I of this book introduces the concept.Chapter II focuses on the Airport Clinic as an enterprise, using the relational data model to develop an object oriented Management Information System. Chapter III discusses the threats to data security and tools available for solution of any such security threats. Chapter IV deals with two emerging trends in the database management systems that are becoming particularly important. Chapter V provides details of the contribution of this book to the subject of DBMS and the Airport Clinic in particular. Chapter VI draws a curtain on the book.