Stored vs Derived Attributes
  • Stored attribute −Stored attributes are the attributes that exist in the physical database . For example , date_of_birth.
  • Derived attribute − Derived attributes are the attributes that do not exist in the physical database, but their values are derived from other attributes present in the database. For example, average_salary in a department should not be saved directly in the database, instead it can be derived. For another example, age can be derived from data_of_birth.

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