Functional Dependency (FD): A relationship between attributes in a relational database where one set of attributes uniquely determines another.

A direct relationship between data elements in a relational database. Functional dependency (FD) states that one data element is dependent on another. For example, social security number (SSN ...

The resultant functional dependency-driven structures, in their own way, describe the essentials of the business area being data modeled. After 3NF, there are two extra normal forms that claim to be ...