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In an ER diagram, how is a multi-valued attribute represented?

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Question: In an ER diagram, how is a multi-valued attribute represented?

Options:

  1. As a rectangle
  2. As an oval
  3. As a double oval
  4. As a diamond

Correct Answer: As a double oval

Solution: 

A multi-valued attribute is represented as a double oval in an ER diagram.

In an ER diagram, how is a multi-valued attribute represented?

Practice Questions

Q1
In an ER diagram, how is a multi-valued attribute represented?
  1. As a rectangle
  2. As an oval
  3. As a double oval
  4. As a diamond

Questions & Step-by-Step Solutions

In an ER diagram, how is a multi-valued attribute represented?
  • Step 1: Understand what a multi-valued attribute is. It is an attribute that can have multiple values for a single entity.
  • Step 2: Know that in an ER diagram, attributes are usually represented by ovals.
  • Step 3: Learn that a multi-valued attribute is represented by a double oval instead of a single oval.
  • Step 4: Remember that the double oval indicates that the attribute can hold more than one value.
  • Multi-valued Attribute – An attribute that can hold multiple values for a single entity.
  • ER Diagram Representation – The visual representation of entities, attributes, and relationships in a database.
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