Help Me/Question Difference Between Functional Dependency And Fully Functional Dependency?


Yellow Belt
Functional Dependency: It is an assosiation between the two attributes of the relation such that one attribute is known as determinant and other is known as determined and for each determinant there is one and only one value of determined. For example: A-->B here A is determinant and B is determined and read as B is functionally determinant on A.


Fully Functional Dependency: FFD states that as the non-key attributes is Functional dependent on the composite primary key but it should not be functionally dependent in the proper subset of primary key.

Swati Mishra

Yellow Belt
Fully functional dependency is the set of constraints between two attributes and full functional dependency occurs when you already meet the requirement for a functional dependency and on the left side of the functional dependency.