What is Fully Functional Dependency?
Real-life dependencies emerge when, within one relationship, the value of one of the attributes is capable of identifying the value of another attribute. Simply put, if A fully determines B without any proper subset of A giving full cause to B, then A is said to fully depend on B. In other words, you cannot derive B from a smaller part of A.
An Example of Fully Functional Dependency
To visualize a relation called “Employee” with the attributes {Employee_ID, Employee_Name, Department, Salary}, use the following diagram: Basically, if that the Employee_ID attribute figures out the other attributes in the table, such as the Employee_Name, Department, and Salary, the Employee_ID attribute fully functionally depends on all these attributes.
Fully Functional Dependency in DBMS
In the case of database management systems (DBMS), knowledge of dependencies is vital for the base built on this and it is a must for the development of the database that is most useful and practical. Special interdependency, which is expressed in the schema of the database, is based on the rule of changing attributes by changing the rest of the schema’s attributes. One of the more powerful normalization forms, fully functional dependency, remains an important key to the normalization process and ensuring reliability and integrity of data. We’ll look into the enabler of totally working with dependency and the way it is connected with the design of a database.