Jpa - The Java Persistence API

The name of the object maintained by design becomes the table name and fields are converted into columns.

To do that, let's focus on the CustomerBean class and compare it to the CustomerBean entity.

Note: Default value of Strategy attribute is AUTO.

Here the required framework is taken over by JPA.

By comparison, in EJB 2.

To create a dynamic query, you use the createQuery method of the EntityManager.

Most of the time, a good JPQL Query can fulfill our needs and most importantly, maintain a level of abstraction from the actual database implementation.

Description: Generally, Java developers use lots of code, or use the proprietary framework jpa interact with the database, whereas using JPA, the burden of interacting with the database reduces significantly.

Views: 3469 Date: 25.03.2022 Favorited: 103 favorites
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You can specify composite keys in two different ways, using an IdClass annotation or an EmbeddedId annotation.
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