What's the purpose of the Timestamp? To allow a student to register for a class in multiple semesters? If that's the case I would suggest you abstract out the Semester and inlclude a SemesterID in the ...
The associative entity allows as many relationships as one wants; any enforcement of a rule, such as a maximum limit, or a limit at specific points in time may only be enforced ...
In the realm of data modeling, many-to-many relationships are often considered an "odd duck." Unlike one-to-one or one-to-many relationships, which can be directly implemented in physical database ...
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