Results into insert or update queries based on the provided data. If the data is present in the database, update query is executed. update() Hibernate update should be used where we know that we are only updating the entity information. I am new to spring data jpa. I have a scenario where I have to create an entity if not exists or update based on non primary key name.Below is the code i wrote to create new entity,it is working fine,but if an already exists record ,its creating duplicate.How to write a method to update if exists ,i usually get list of records from client. ...It creates a collection of Spring MVC controllers, JSON converters, and other beans to provide a RESTful front end. These components link up to the Spring Data JPA backend. When you use Spring Boot, this is all autoconfigured. If you want to investigate how that works, by looking at the RepositoryRestMvcConfiguration in Spring Data REST. spring jpa insert, Oct 03, 2019 · We also discussed the Spring Data JPA compelling features that make it a powerful tool. In this article, you'll learn how to use Spring Data JPA with the H2 database in a Spring Boot project for storing, accessing, updating and deleting data (CRUD operations).