Esri ArcSde 10.0 | 1.04 Gb

A relational database management system provides a straightforward formal structure for storing and managing information in tables. Data storage and retrieval are implemented with simple tables. The multiuser geodatabase utilizes the power of the RDBMS. Certain characteristics of geographic data management, such as disk-based storage, definition of attribute types, query processing, and multiuser transaction processing, are delegated to the RDBMS. The multiuser geodatabase uses an RDBMS to provide you with Flexibility to store your data in a supported RDBMS of your choice Ability to apply your existing IT knowledge and experience to manage the environment through common RDBMS practices Spatial types to enhance data storage and interoperability Home: http://www.esri.com/software/arcgis/geodatabase/storage-in-an-rdbms.html