The annotation is used on the Employee entity to specify the foreign key column. A department can have multiple employees, so a one-to-many relationship is established between them using the annotation on the Department entity and the annotation on the Employee entity. = "departments")Įxample of implementing a one-to-many relationship between Department and Employee entities in Hibernate. The annotation can be used on the child entity to specify the foreign key column. To implement a one-to-many relationship in Hibernate, you can use the annotation on the parent entity to specify the mapping. Private String = "department", fetch = FetchType.LAZY)Įxample of using lazy loading in Hibernate to load the employees associated with a Department entity only when they are actually needed. Lazy loading can improve performance by reducing the amount of data that needs to be retrieved from the database, but it can also result in additional database queries if the associated entities are accessed later. In Hibernate, eager loading fetches all associated entities immediately when the parent entity is loaded from the database, while lazy loading loads the associated entities only when they are actually needed.Įager loading can result in more efficient querying of the database, as all necessary data is retrieved in a single query, but it can also cause performance issues and waste resources if unnecessary data is retrieved. Public class Department = GenerationType.IDENTITY)Įxample of using mapping annotations in Hibernate to specify the primary key, column names, and relationships between Employee and Department entities. Public class Employee = GenerationType.IDENTITY)
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