Spring Data JPA and Data Service Layer using CrudRepository - Spring Boot Lesson 10

Spring Data JPA, use JPA to map Entity to local dev DB Apache Derby. It will create relational database also will map entity to table.
We are building data service layer implementing the CrudRepository interface which provides the generic set of methods used for CRUD operation. You can always write new method implementation if you are doing something specific which is not covered in implementation but here it is sufficient for our project goals.