A design trap occurs when a relationship is improperly or incompletely identified and is therefore represented in a way that is not consistent with the real world.
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Q7: An entity supertype can have disjoint or
Q8: The relationships depicted within the specialization hierarchy
Q9: At the implementation level, the supertype and
Q10: A subtype contains attributes that are common
Q11: The function of the primary key is
Q13: Entity supertypes and subtypes are organized in
Q14: Overlapping subtypes are subtypes that contain a
Q15: The entity supertype contains common characteristics, and
Q16: Within a specialization hierarchy, a supertype can
Q17: Specialization is the top-down process of identifying
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