Почему при таком селекте в Oracle у меня не высвечиваются поля в Crystal report?

select (CASE WHEN sp.OPERATION_DATE BETWEEN '01.01.2006' and '31.01.2006' THEN 1
WHEN sp.OPERATION_DATE BETWEEN '01.02.2006' and '28.02.2006' THEN 2
WHEN sp.OPERATION_DATE BETWEEN '01.03.2006' and '31.03.2006' THEN 3
WHEN sp.OPERATION_DATE BETWEEN '01.04.2006' and '30.04.2006' THEN 4
WHEN sp.OPERATION_DATE BETWEEN '01.05.2006' and '31.05.2006' THEN 5
WHEN sp.OPERATION_DATE BETWEEN '01.06.2006' and '30.06.2006' THEN 6
WHEN sp.OPERATION_DATE BETWEEN '01.07.2006' and '31.07.2006' THEN 7
WHEN sp.OPERATION_DATE BETWEEN '01.08.2006' and '31.08.2006' THEN 8
WHEN sp.OPERATION_DATE BETWEEN '01.09.2006' and '30.09.2006' THEN 9
WHEN sp.OPERATION_DATE BETWEEN '01.10.2006' and '31.10.2006' THEN 10
WHEN sp.OPERATION_DATE BETWEEN '01.11.2006' and '30.11.2006' THEN 11
WHEN sp.OPERATION_DATE BETWEEN '01.12.2006' and '31.12.2006' THEN 12
end),
(CASE WHEN sp.OPERATION_DATE BETWEEN '01.01.2006' and '31.03.2006' THEN 1
WHEN sp.OPERATION_DATE BETWEEN '01.04.2006' and '30.06.2006' THEN 2
WHEN sp.OPERATION_DATE BETWEEN '01.07.2006' and '30.09.2006' THEN 3
WHEN sp.OPERATION_DATE BETWEEN '01.10.2006' and '31.12.2006' THEN 4
end) from somehing