String q = "select new com.lufthansatechnik.mscoreengine.homes.DepartmentScore(" +
                   "            scoreEntry.department.id, scoreEntry.department.name, scoreEntry.yearMonth, sum(scoreEntry.score)) " +
                   "from ScoreEntry scoreEntry " +
                   "where scoreEntry.yearMonth >= :startMonth and scoreEntry.yearMonth <= :endMonth " +
                   "group by scoreEntry.department.id, scoreEntry.department.name, scoreEntry.yearMonth";

        List a = entityManager.createQuery(q)
                .setParameter("startMonth", startYearMonth)
                .setParameter("endMonth", endYearMonth)
                .getResultList();