This encyclopedia is a wide-ranging collection of diverse coverage of topics related to database concepts, technologies, and applications. It provides an overview of the state-of-the-art of classical subjects and has contributions from over 175 international researchers from 33 countries, more than 970 terms and definitions and over 2,400 references. It also delivers clear and concise explanations of emerging issues and technologies such as multimedia database systems, data warehousing and mining, geospatial and temporal databases, and data reverse engineering.