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Define an abstraction by which relationships are treated as higher level entities
Ans: Aggregation.
It is an abstraction by which relationships are treated as higher level entities Aggregation. (In ER diagram, aggregation is utilized to denote a relationship as an entity set.)
What are the basic objects of the data dictionary? Tables Domains Data elements Structures Foreign Keys
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prototype of a distributed information system for a national car part retail outlet chain.
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