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DBMS BCA Unit-1 DBMS - Introduction The File Based System Database System vs. File Based System Limitations of File Based System Database System Components Advantages of Database Approach DBMS ARCHITECTURE Three Level Architecture of DBMS External or View Level Conceptual Level Internal or Physical Level Data Independence Physical DBMS Architecture Database Manager Database Users Database Administrator (DBA) Roles and Responsibilities of DBA Data Models The Relational Data Model The Network Data Model The Hierarchical Data Model MySQL Installation in Ubuntu


Database System Components

A database system involves four major components
  • Data
  • Hardware
  • Software
  • Users
Database System - Provides the enterprise with centralized control of its data.
A database contains not only the data but also the complete definition of the database structure and constraints.