Question: EX 5.4) Show how to enforce the constraint an instructor cannot teach in two different classrooms in a semester in the same time slot. using

EX 5.4) Show how to enforce the constraint an instructor cannot teach in two different classrooms in a semester in the same time slot. using a trigger (remember that the constraint can be violated by changes to the teaches relation as well as to the section relation).

Please provide the answer in terms of the syntax from Database Systems Concepts, 6th Edition, Chapter 5.

Thank you.

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