Book Image

jOOQ Masterclass

By : Anghel Leonard
Book Image

jOOQ Masterclass

By: Anghel Leonard

Overview of this book

jOOQ is an excellent query builder framework that allows you to emulate database-specific SQL statements using a fluent, intuitive, and flexible DSL API. jOOQ is fully capable of handling the most complex SQL in more than 30 different database dialects. jOOQ Masterclass covers jOOQ from beginner to expert level using examples (for MySQL, PostgreSQL, SQL Server, and Oracle) that show you how jOOQ is a mature and complete solution for implementing the persistence layer. You’ll learn how to use jOOQ in Spring Boot apps as a replacement for SpringTemplate and Spring Data JPA. Next, you’ll unleash jOOQ type-safe queries and CRUD operations via jOOQ’s records, converters, bindings, types, mappers, multi-tenancy, logging, and testing. Later, the book shows you how to use jOOQ to exploit powerful SQL features such as UDTs, embeddable types, embedded keys, and more. As you progress, you’ll cover trending topics such as identifiers, batching, lazy loading, pagination, and HTTP long conversations. For implementation purposes, the jOOQ examples explained in this book are written in the Spring Boot context for Maven/Gradle against MySQL, Postgres, SQL Server, and Oracle. By the end of this book, you’ll be a jOOQ power user capable of integrating jOOQ in the most modern and sophisticated apps including enterprise apps, microservices, and so on.
Table of Contents (26 chapters)
1
Part 1: jOOQ as a Query Builder, SQL Executor, and Code Generator
4
Part 2: jOOQ and Queries
11
Part 3: jOOQ and More Queries
16
Part 4: jOOQ and Advanced SQL
22
Part 5: Fine-tuning jOOQ, Logging, and Testing

Chapter 5: Tackling Different Kinds of SELECT, INSERT, UPDATE, DELETE, and MERGE

A common scenario for jOOQ beginners originates from having a plain valid SQL that should be expressed via the jOOQ DSL API. While the jOOQ DSL API is extremely intuitive and easy to learn, the lack of practice may still lead to scenarios where we simply cannot find or intuit the proper DSL methods that should be chained to express a certain SQL.

This chapter addresses this kind of issue via a comprehensive collection of popular queries, which gives you the chance to practice jOOQ DSL syntax based on the Java-based schema. More precisely, our aim is to express, in jOOQ DSL syntax, a carefully harvested list of SELECT, INSERT, UPDATE, DELETE, and MERGE statements that are used in our day-to-day job.

This way, by the end of this chapter, you should have funneled a significant number of SQLs through the jOOQ DSL syntax and tried them out against MySQL, PostgreSQL, SQL Server, and Oracle databases in...