Spring Boot Database Development: Master PostgreSQL, JPA, Hibernate, Relationships, Transactions, Migrations, and Performance
Build reliable, scalable, and production-ready database applications with Spring Boot and PostgreSQL.
Spring Boot Database Development is a practical guide to designing and implementing professional persistence layers using Java 21, Spring Boot 4.x, Spring Data JPA, Hibernate, PostgreSQL, Flyway, and Testcontainers.
As Book 2 of the Spring Boot Development Series, it builds naturally on the REST API foundation established in Book 1. Rather than presenting disconnected examples, the book develops one connected Order and Inventory Management application, showing how database concepts work together in a realistic project.
You will learn how to design relational schemas, map entities correctly, create repositories and queries, manage relationships, protect multi-step operations with transactions, handle concurrent updates, evolve schemas safely, and diagnose performance problems.
Inside, you will discover how to:
Design PostgreSQL tables, keys, constraints, and indexes
Map entities, value objects, dates, enums, and monetary values
Build repositories with CRUD, pagination, JPQL, projections, and specifications
Model one-to-many, one-to-one, and association-entity relationships
Use cascades, orphan removal, and fetch strategies safely
Manage transactions, isolation levels, rollbacks, and propagation
Prevent lost updates with optimistic and pessimistic locking
Handle race conditions, duplicate operations, and deadlocks
Manage schema changes with versioned and repeatable Flyway migrations
Test repositories, constraints, transactions, and migrations with PostgreSQL Testcontainers
Detect N+1 queries and analyze performance with EXPLAIN ANALYZE
Configure batching, pagination, connection pools, and production monitoring
The explanations remain beginner-friendly while addressing the decisions developers face in real applications. You will not simply learn which annotation to use-you will understand why it matters, when it is appropriate, and which common mistakes can damage data integrity or performance.
By the end of the book, you will have a tested, migration-driven, concurrency-aware, and production-ready persistence layer that can support the next stage of the series: Spring Security for REST APIs.
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