From the course: Java Persistence with JPA and Hibernate

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One-to-one relationships

One-to-one relationships - JPA Tutorial

From the course: Java Persistence with JPA and Hibernate

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One-to-one relationships

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- [Instructor] A one-to-one relationship simply means that one of something is linked with only one of another thing. For example, a person owns a dog and a dog is owned by a person. It is a relationship in which two entities are linked, where an instance of one entity is linked to only one instance of the other entity. Remember to run the MariaDB 06_01 SQS script before you follow along with this demo. Let's run it. In this library database, there are authors for books. So we have an author table as well. The author ID is a foreign key in the book table. Let's assume that all the books have been authored by a single author, so we can say that a given book has only one author. Also, if we have only one single book of that author in the library, we can say that there's only one book of that author. How can we map this one to one relationship between two entities in Hibernate? We already have the book Entity class. I've also created the author Entity class. In JP, relationships can be…

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