ABSTRACT
The developments in computer networking technology and database systems technology resulted in the development of distributed databases in the mid-1970s. It was felt that many applications would be distributed in the future and therefore the databases had to be distributed also. Although many definitions of a distributed database system have been given, there is no standard definition. Our discussion of distributed database system concepts and issues has been influenced by the discussion in [CERI84]. A distributed database system includes a Distributed DataBase Management System (DDBMS), a distributed database, and a network for interconnection. The DDBMS manages the distributed database. A distributed database is a database that is distributed across multiple sites.
