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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


Data Models

  • A collection of conceptual tools for describing data, data relationships, data semantics, and consistency constraints.
  • Provide a way to describe the design of a database at the logical level.
  • Three data models that are used for database management are:
    • The Relational Data Model
    • The Hierarchical Data Model
    • The Network Data Model