Выбрать все белые квадраты, которые окрашивались только из баллончиков, пустых к настоящему времени. Вывести имя квадрата

Задание: 92 (ZrenBy: 2003-09-01)

 

SELECT Q_NAME
FROM utQ
WHERE Q_ID IN (SELECT DISTINCT B.B_Q_ID
                FROM (SELECT B_Q_ID
                        FROM utB
                        GROUP BY B_Q_ID
                        HAVING SUM(B_VOL) = 765) AS B
                WHERE B.B_Q_ID NOT IN (SELECT B_Q_ID
                                        FROM utB
                                        WHERE B_V_ID IN (SELECT B_V_ID
                                                          FROM utB
                                                          GROUP BY B_V_ID
                                                          HAVING SUM(B_VOL) < 255)))