List<Call> calls1 = entityManager.createQuery(
	"select c " +
	"from Call c " +
	"join c.phone p " +
	"order by p.number " +
	"limit 50",
	Call.class)
.getResultList();

// same thing
List<Call> calls2 = entityManager.createQuery(
	"select c " +
	"from Call c " +
	"join c.phone p " +
	"order by p.number " +
	"fetch first 50 rows only",
	Call.class)
.getResultList();

List<Person> persons = entityManager.createQuery("select p " +
        "from Person p " + 
        "order by p.age ", Person.class).
      .setFirstResult(20)
      .setMaxResults(50)
      .getResultList();