hibernate查询记录总数量

String hql = "select count(*) from Presc p "
        + "where p.operType = ? and (trunc(p.orderDate) between ? and ?)";
Query query = getSession().createQuery(hql);
query.setString(0, prescTypeCode);
query.setDate(1, startDate);
query.setDate(2, endDate);
Integer count = (Integer) query.uniqueResult();