You are creating an enhanced entity-relationship model for a
campus information system. A junior team member...
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You are creating an enhanced entity-relationship model for acampus information system. A junior team member who is helping youasks you to describe the following terms with examples of relevantentities from the system, for example, students, activities etc.
1. Supertype and Subtype
2. Disjoint and Overlapping Discriminator
3. Total and Partial Completeness
4. Attribute Inheritance
Answer & Explanation
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1Supertype and Subtype Supertype is an entity type that has got relationship parent to child relationship with one or more subtypes and it contains attributes that are common to its subtypes Subtypes are subgroups of the supertype entity and have unique attributes but they will be different from each subtype For example Examination is a supertype of QUIZ TERM examination and FINAL examination subtypeextra points for
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