4. What Are The Difference Between Logical Data Model And Conceptual Data Model?

What Are The Difference Between Logical Data Model And Conceptual Data Model?

Answer

  1. In a logical data model, primary keys are present, whereas in a conceptual data model, no primary key is present.
  2. In a logical data model, all attributes are specified within an entity. No attributes are specified in a conceptual data model.
  3. Relationships between entities are specified using primary keys and foreign keys in a logical data model. In a conceptual data model, the relationships are simply stated, not specified, so we simply know that two entities are related, but we do not specify what attributes are used for this relationship.

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