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In today's E-R models,attributes of relationships are still used.
Q5: UML-style E-R diagrams allow for the existence
Q23: In IDEF1X,extended E-R model supertype entities are
Q26: Explain the steps in the process of
Q28: It is easy to enforce the referential
Q57: Which of the following is not true
Q65: In an enterprise-class database system,the database application
Q78: In an SQL query,which of the following
Q79: An ID-dependent entity is an entity whose
Q87: When placing a foreign key for a
Q97: In an SQL query,a join operation is