jpa criteria group by clause

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 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…

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

JPA Inheritence Overview Inheritence is a key feature of object-oriented programming language in which a child class can acquire the properties of…

JPA Cascade Persist The cascade persist is used to specify that if an entity is persisted then all its associated child entities…

Inserting an Entity In JPA, we can easily insert data into database through entities. The EntityManager provides persist() method to insert records.…

JPA Cascade Remove The cascade remove is used to specify that if the parent entity is removed then all its related entities…