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What Is A Subtype And Super Type Entity? |
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Answer» An ENTITY can be split into MANY entities (sub-entities) and grouped based on some characteristics and each sub entity will have attributes RELEVANT to that entity. These entities are CALLED subtype entities. The attributes which are common to these entities are moved to a super (higher) level entity, which is called as SUPERTYPE entity. An entity can be split into many entities (sub-entities) and grouped based on some characteristics and each sub entity will have attributes relevant to that entity. These entities are called subtype entities. The attributes which are common to these entities are moved to a super (higher) level entity, which is called as supertype entity. |
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