Spring Boot Restful + PostgreSQL + JPA @ManyToMany and Ways to Save and Update Records - Part 4

In this video I have shown the implementation of @ManyToMany annotations and number of ways to insert and update records in table when entities have this many to many relationship. Topics covered:
Design difference between @OneToMany vs @ManyToMany.
Overview of @ManyToMany.
Implementation of @ManyToMany.
Table creation in PostgreSQL.
@JoinTable annotation properties.
Ways to save records in a table.