Hql，如何在具有一对多关系的表之间编写连接查询？

Question

我有2张桌子。 1st一个与2nd个有oneToMany关系。

班级作者

@Entity
@Table(name = "Author")
Public class Author{

    @Id
    @Column(name = "AuthorId")
    private int autherId;

    @Column(name = "AuthorName")
    private String authorName;

    @OneToMany
    @JoinColumn(name="AuthorId",referencedColumnName="AuthorId")
    List<Book> Books;

    //getter and setter
}

课本

@Entity
@Table(name = "Book")
Public class Book{

    @Id
    @Column(name = "BookId")
    private int bookId;

    @Column(name = "BookName")
    private String bookName;

    @Column(name = "AuthorId")
    private int authorId;

    //getter and setter
}

如何编写Hql查询以便我将获得所有作者和书籍，条件是书名应以hello开头

我知道使用这样的查询，

  from Author;

我可以拿到所有作者和书籍，但如何在书上给出条件？

Answer 1

我认为它是这样的：

select a from Author as a join a.Book as ab where ab.AuthorId like '%"hello"%';

虽然不确定a.Book，它也可能是a.Books，因为你的列名被命名为。