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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.)
normal forms
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List the drawbacks of relational database system A) Repetition of data B) Inability to s certain information.
WHAT IS DBMS
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