The Jakarta Persistence API (JPA) is a Java specification that bridges the gap between relational databases and object-oriented programming. This two-part tutorial introduces JPA and explains how Java ...

Test-driven software must often drop, create and populate database tables with records before it runs a suite of unit tests. For this reason, the ability to have JPA frameworks -- such as EclipseLink ...

Community driven content discussing all aspects of software development from DevOps to design patterns. MySQL remains one of the most popular, open-source databases in the Java community, while ...

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This spring-data-graphql-jpa-demo project is intended to provide an easy to understand usage showcase of java-data-graphql together with spring-boot-starter-data-graphql-jpa. The java-data-graphql ...

There are the following entities: Company, Department and Employee. The entities relates to each other as follows: o Company relates to Department as one-to-many o Department relates to Company as ...

Every JPA entity has a primary key, but some entities have more than one value as their primary key. In this case, you need to use a composite key. This Java tip introduces you to using composite keys ...