The Jakarta Persistence API (JPA) is a specification that defines a standardized framework for data persistence. Persistence is the fundamental mechanism for saving and retrieving data over time. In Java, the data we persist is held in objects. The JPA specification lets you define how your objects will be persisted while leaving the work itself to an underlying framework. The mechanism of persistence in JPA is object-relational mapping (ORM). The concept of object-relational mapping was pion...