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FDs in Relationships:
Enrols Relationship: None as it is many to many
Teaches Relationship: Course code → Instructor
Instructor → Course code
The next question is: How do we recognize the functional dependence in a database model?
Functional dependencies occur from the nature of the actual world that the database models. Often A and B are facts about an entity where A may be some identifier for the entity and B some characteristic. Functional dependencies cannot be automatically determined by studying one or more cases of a database. They can be determined only by a careful study of the actual world and a clear understanding of what every attribute means.
There are no thumb rules for determining FDs.
Functional dependence is an vital concept and a large body of formal theory has been developed about it.
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
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A database to track your progress in your college program will track your progress towards graduation! A database that has information containing the classes that you have taken, c
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Why Like predicate used for? LIKE predicate: The LIKE predicate searches for strings in which have a certain pattern.
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