It is correct to say that each value of (staffNo, sName) is associated with a single value of branchNo. However, it is not a full functional dependency because branchNo is also func- tionally dependent on a subset of (staffNo, sName), namely staffNo. In other words, the functional dependency shown above is an example of a partial dependency. The type of functional dependency that we are interested in identifying is a full functional dependency as shown below.