Entity Relationship Model: Attributes, Entities, and Relationships

Posted by on Jan 21, 2025 in Creation and Design | 0 comments

ER Model: Attributes, Entities, and Relationships

Attribute Definitions

  • Composite Attribute: An attribute composed of multiple components. Example: Full Name (First Name, Last Name).
  • Derived Attribute: An attribute calculated from other attributes. Example: Age (from Date of Birth).
  • Single-Valued Attribute: An attribute with only one value. Example: Social Security Number.
  • Multivalued Attribute: An attribute with multiple values. Example: Phone Numbers.
  • Simple Attribute: An attribute that cannot
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