As a quick reminder, First Normal Form (1NF) removes repeating groups; Second Normal Form (2NF) removes partial functional dependencies ... with at least one overlapping attribute. A classic example ...

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 ...

For example ... transitive dependency of date-of-birth (SSN->DOB), because it is dependent on name (SSN->NAME), and name is dependent on date-of-birth (NAME->DOB). Contrast with functional ...