jpa entity manager

JPA Map Mapping A Map is an interface in which a unique key is associated with each value object. Thus, operations like…

JPA One-To-One Mapping The One-To-One mapping represents a single-valued association where an instance of one entity is associated with an instance of…

JPA Table-per-class Strategy In table-per-class strategy, for each sub entity class a separate table is generated. Unlike joined strategy, no separate table…

JPA Single Table Strategy The single table strategy is one of the most simplest and efficient way to define the implementation of…

JPA Tutorial JPA tutorial provides basic and advanced concepts of Java Persistence API. Our JPA tutorial is designed for beginners and professionals.…

Update an Entity JPA allows us to change the records in database by updating an entity. JPA Entity Update Example Here, we…

Deleting an Entity To delete a record from database, EntityManager interface provides remove() method. The remove() method uses primary key to delete…

JPA Object Relational Mapping Object Relational Mapping (ORM) is a functionality which is used to develop and maintain a relationship between an…

JPA Entity Introduction In general, entity is a group of states associated together in a single unit. On adding behaviour, an entity…

JPA One-To-Many Mapping The One-To-Many mapping comes into the category of collection-valued association where an entity is associated with a collection of…