public int countCarRentalsBetweenDate(Date dateFrom, Date dateTo){
		TypedQuery<CarEntity> query = entityManager.createQuery("SELECT r.car FROM RentDetailsEntity r WHERE "
				+ "(r.datePickup BETWEEN :dateFrom AND :dateTo) OR "
				+ "(r.dateReturn BETWEEN :dateFrom AND :dateTo) OR "
				+ "(r.datePickup<:dateFrom AND r.dateReturn>:dateTo GROUP BY r.car", CarEntity.class);
		query.setParameter("dateFrom", dateFrom);
		query.setParameter("dateTo", dateTo);
		List<CarEntity> carList = query.getResultList();
        return carList.size();
	}