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ISRO2017-8

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Which symbol denote derived attributes in ER Model?

  1. Double ellipse
  2. Dashed ellipse
  3. Squared ellipse
  4. Ellipse with attribute name underlined
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An attribute which can be derived from other attributes of the entity type is known as a derived attribute. e.g.; Age (can be derived from DOB). In ER diagram, a derived attribute is represented by a dashed Ellipses.

         

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