How to fetch multiple to-many relationships with jOOQ MULTISET
Introduction In this article, we are going to see how we can fetch multiple to-many relationships with jOOQ MULTISET so that we avoid bumping into an unintentional Cartesian Product. The approach taken by jOOQ is truly revolutionary since it offers a solution that allows you to fetch multiple to-many relationships using a single type-safe query.
A beginner’s guide to database table relationships
Introduction In a relational database, a relationship is formed by correlating rows belonging to different tables. A table relationship is established when a child table defines a Foreign Key column that references the Primary Key column of its parent table. Every database table relationship is, therefore, built on top of Foreign Key columns, and there can be three table relationship types: one-to-many is the most common relationship, and it associates a row from a parent table to multiple rows in a child table. one-to-one requires the child table Primary Key to be… Read More
Best way to map the JPA and Hibernate ManyToMany relationship
Introduction In this article, I’m going to show you the best way to map a ManyToMany association when using JPA and Hibernate. As simple as JPA annotations might be, it’s not always obvious how efficient they are behind the scenes.
A beginner’s guide to JPA and Hibernate Cascade Types
Introduction In this article, we are going to learn how the JPA and Hibernate Cascade Types work. JPA translates entity state transitions to database DML statements. Because it’s common to operate on entity graphs, JPA allows us to propagate entity state changes from Parents to Child entities. This behavior is configured through the CascadeType mappings.
