What is the use of @Transactional with JPA and Hibernate?

Question

I\'m learning about how to create REST API with JPA and Hibernate and a MySQL database and I see this @Transactional annotation. Can someone explain what is the use of this anno

Answer 1

Generally the @Transactional annotation is written at the service level.

It is used to combine more than one writes on a database as a single atomic operation.

When somebody call the method annotated with @Transactional all or none of the writes on the database is executed.

In the case of read operations it is not useful and so it is in case of a single atomic write. You are using it in a single read (select) so adding or removing the @Transactional annotation has no impact.