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Views of Data


September 17, 2016
Published By : Pratik Kataria
Categorised in:


A major purpose of DBMS is to provide users with an abstract view of the data. There are 3 levels of abstraction.

  1. Physical Level: Describes how the data are actually stored (complex low-level data structures in detail)
    e.g. customer, account, employee record
  2. Logical View: Describes what data are stored in database and relationships.
    e.g. data type of data
  3. View Level: Describes only part of entire database.
    e.g. application programs to display data