JPA ORM & SpringData JPA for Complete Beginner with Handson

Explore how to define relationships between entities in JPA using four annotations: one to one, one to many, many to one, and many to many.

Explore inheritance strategies in JPA and Hibernate, learn how four mapping approaches store inherited fields across tables, and choose the best strategy for entities like books and blog posts.

Discover the single table strategy for JPA inheritance, mapping all hierarchy entities to one table, simplifying schema, avoiding joins, and boosting performance with shared publication fields.

Explore joining multiple entities in JPA by fetching authors and their books via a common foreign key. Learn about theta joins for unrelated entities and why JPA restricts them.

Explore JPQL functions used in select and where clauses, mirroring SQL, and apply examples like upper, lower, current date, substring, trim, length, locate, abs, sqrt, mod, and size.

Explore grouping in JPQL using group by and the having clause, counting by last name, listing non-aggregated attributes, and filtering groups such as last names starting with B.

call named queries at runtime using typed query and query interfaces, instantiated via different entity manager factory methods, to return typed results or raw results.

See how Hibernate uses a version field to detect conflicting updates in a product entity, and how a higher database version triggers an optimistic lock exception.

Enable pessimistic locking with a transactional method in Spring Data JPA by reading, updating, and saving a product entity, with the transactional annotation controlling the lock until commit or rollback.

Learn to optimize performance with pagination in Spring Data JPA by lazy loading data in pages, using a fixed page size and page number.

Prevent the N+1 select problem by using join fetch to retrieve related data in a single query. Replace iterative per-item queries with a join fetch to boost database performance.

optimize queries by balancing join usage and using criteria builder API for dynamic queries; rely on JPA repository methods like find by, delete in batch, and flush after saves.

Engage in hands-on practicum with JPA and Spring Data JPA, building Maven projects, using bare JPA with EntityManager and Java 17, and another with Spring Boot and Spring Data JPA.

Explore future trends in Java enterprise development with Spring Data JPA, including repositories, query DSL, auditing, pagination, and multi-database support from relational databases to Neo4j and MongoDB.

Set up your development environment by installing JDK 17 for Windows 64 via MSI and selecting an IDE such as IntelliJ, Eclipse, or NetBeans, then configure Maven in your classpath.

Configure the persistence unit in META-INF/Persistence.xml using Hibernate to connect to an in-memory H2 database or MySQL, setting dialect, show_sql, and hbm2ddl.auto options with resource local transactions.

Set up a Twitter repository using an entity manager and factory for a persistence unit, and implement add, find, search, update, and delete operations within transactions.

Set up the teacher repository with an entity manager and factory, define constructors, and perform add, find by id, update, and delete operations within a resource-local persistence unit transaction.

Explore how pom.xml dependencies configure spring data jpa projects and how application.properties and profile-specific files control local, dev, test, and production settings, including H2 and MySQL databases.

Update property flow through the property controller and service using patch or put to find and update a property, save it, and illustrate Spring Data JPA crud operations.

Learn to write find by queries in Spring Data JPA using an enterprise project with role and address entities, including enum name searches via repository.