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     A database management system is system software for creating and managing database. the DBMS Provides users and Programmers with a systematic way to create, retrieve, update and programmers with a systematic way to create, retrieve, update and manage data. A view defines what data the user sees and how that user sees the data. The DBMS provides a level of abstraction between the conceptual schema that defines the logical structure of the database and the physical schema that describes the files, indexes and other physical mechanisms used by the database. A view defines what data the user sees and how that user sees the data. The DBMS provides a level of abstraction between the conceptual schema that defines the logical structure of the database and the physical schema that describes the files, indexes and other physical mechanisms used by the database.