Задание: 113 (Serge I: 2003-12-24)
Вывод: количество каждой краски в порядке (R,G,B)
SELECT sum(255-ISNULL ([R],0) ) R , sum(255-isnull([G],0)) G, sum(255-isnull([B],0)) B
FROM
(
/*merging all tables to find paint filling and color for all squares*/
select ISNULL(B_Q_ID, Q_ID) ID, V_COLOR, B_VOL Vol from
utB RIGHT JOIN utQ on B_Q_ID=Q_ID
LEFT JOIN utV on B_V_ID=V_ID
) as SourceT
PIVOT
(
/*rotating table and calculating each paint volume for each square*/
SUM(Vol) For V_COLOR IN ([R], [G], [B])
) Pvt
/*excluding white squares*/
where ISNULL ([R],0) + isnull([G],0) + isnull([B],0) <765
