Inner join in jpsql?

See more:

SQL

JavaSE

JavaSE6

I have this:

-Customer.java:

@OneToMany(cascade = CascadeType.ALL, mappedBy = "cliente")
    private List<order> order = new ArrayList();

-order.java:

@ManyToOne
    private Customer customer;

-SoldBook.java

@ManyToOne
    private Order order

Is it possible to get a querry that appear if a customer bought a book?

What I have tried:

I tried to do:

SELECT l.order FROM soldBook l INNER JOIN l.order p  INNER JOIN p.customer c WHERE l.customer = :" +customer