In Hibernate a derived property (also called a calculated property) is a read-only property whose value is calculated at fetch time using SQL expressions. Example: For an employee entity with properties such as an id and the employee name also a monthlySalary property, you might also want to have a yearlySalary which is not necessarily stored in the database. package net.ozar.exp.entity; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table(name=”EMPLOYEE”) public class Employee implements …