This book is the professional guide about the data management system, and an essential book for Western data management practitioners. Besides being a useful guide and working reference for many Chiniese information technology and data management staffs, it can be used as the graduate teaching material for computer, industry and commerce management, information management and other professionals at the same time. By reading this book, data management practitioners will effectively improve data management knowledge and skills. The book is also a training and reference book introduced by DAMA International for data management professionals the authentication (CDMP) examination.