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PreviousConstruct an *E-R diagram* for a university registrar's office. The office maintains data about each class, including the instructor, the enrollment, and the time and place of the class meetings. For each class pair, a grade is recorded. Document all assumptions that you make about the mapping constraints.NextExplain the following operations with the help of examples: (i) Generalized projection (ii) Outer join (iii) Aggregate function
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