JPA Fetch and N+1 SELECT problem
LAZY Fetch vs EAGER Fetch and possible optimizations.
JPA
Recent posts on JPA framework
EntityManager: Application managed and Container managed
Persistence Context, Persistence Unit, EntityManager from container and from application.
Read more: EntityManager: Application managed and Container managed
Introduction to JPA and relationship mapping
OneToMany, OneToOne and ManyToMany in JPA.