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IntegrityConstraints  
Updated Jan 5, 2008 by vinya...@gmail.com

Entity integrity A Student should have a matriculation number which is unique and not null. For searching for Student Information, there should be a registered student in the database. Similarly, every Subject has a Unique ID to identify and avoid duplicate values.

Referential integrity Entity Course contains a Unique ID as primary key and Matriculation Number which is the Primary Key of the Entity Student. A course for a Student exist only if the student exist.

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