Hibernate/JPA one-to-many and many-to-many examples

1. https://hellokoding.com/jpa-one-to-many-relationship-mapping-example-with-spring-boot-maven-and-mysql/
2. https://hellokoding.com/jpa-many-to-many-relationship-mapping-example-with-spring-boot-maven-and-mysql/
3. https://hellokoding.com/jpa-many-to-many-extra-columns-relationship-mapping-example-with-spring-boot-maven-and-mysql/
4. https://github.com/hellokoding/jpa-manytomany-extracolumns-springboot-maven-mysql
5. https://vladmihalcea.com/the-best-way-to-map-a-onetomany-association-with-jpa-and-hibernate/
6. https://www.callicoder.com/hibernate-spring-boot-jpa-one-to-many-mapping-example/
7. https://www.callicoder.com/hibernate-spring-boot-jpa-many-to-many-mapping-example/
8. https://github.com/callicoder/jpa-hibernate-tutorials/blob/master/jpa-many-to-many-demo/src/main/java/com/example/jpa/model/Post.java