https://spring.io/guides/gs/accessing-data-jpa/

https://www.baeldung.com/tag/spring-data-jpa/
https://www.baeldung.com/persistence-with-spring-series

2022
https://www.baeldung.com/the-persistence-layer-with-spring-and-jpa
    https://github.com/eugenp/tutorials/tree/master/persistence-modules/spring-jpa-2
        no samples in the articles
    Spring Boot configures Hibernate as the default JPA provider,
    so it's no longer necessary to define the entityManagerFactory bean unless we want to customize it.
        spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
        spring.datasource.username=mysqluser
        spring.datasource.password=mysqlpass
        spring.datasource.url=jdbc:mysql://localhost:3306/myDb?createDatabaseIfNotExist=true
https://www.baeldung.com/multitenancy-with-spring-data-jpa/
    ! super cool