whats is functional dependency
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In relational database theory, a functional dependency is a constraint between two sets of attributes in a relation from a database.In other words, functional dependency is between attributes in a relation.
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A functional dependency occurs when one attribute in a relation uniquely determines another attribute. This can be written A -> B which would be the same as stating "B is functionally dependent upon A."
A functional dependency occurs when one attribute in a relation uniquely determines another attribute. This can be written A -> B which would be the same as stating "B is functionally dependent upon A."
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