Adding relationships between tables

Next, we create a new table called owner that has a one-to-many relationship with the car table. In this case, a one-to-many relationship means that the owner can own multiple cars, but a car can only have one owner. The following Unified Modeling Language (UML) diagram shows the relationship between the tables:

Figure 3.14: OneToMany relationship

The following are the steps to create a new table:

1. First, we must create the Owner entity and repository classes in the com.packt.cardatabase.domain package. The Owner entity and repository are created in a similar way to the Car class.

The following is the source code of the Owner entity class:

// Owner.java
package com.packt.cardatabase.domain;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
@Entity
public class Owner {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long ownerid...