hi Chris,
when you create a new report, you'll see the Add Command option to create a report based off of a command object as Dell mentioned.
assuming that you've got a verison of oracle that supports the select with directive, you can use a command similar to what's below, but changing the field names to your own...
WITH DRT AS (SELECT DS.COMPANYNAME AS NAME, SUM(FSO.QUANTITYORDERED) AS AMOUNT
FROM STS.DIMSUPPLIER DS INNER JOIN STS.FCTSUPPLIERORDERS FSO ON DS.SUPPLIERID=FSO.SUPPLIERID
GROUP BY DS.COMPANYNAME ),
DRTR AS (SELECT DRT.*, RANK() OVER (ORDER BY AMOUNT DESC) as RANK FROM DRT)
SELECT 'TOP 5' AS GROUPER, DRTR.* FROM DRTR WHERE RANK <= 5 AND NAME <> 'ÚNKNOWN'
UNION
SELECT 'UNKOWN' AS GROUPER, DRTR.* FROM DRTR WHERE NAME = 'ÚNKNOWN'
UNION
SELECT 'OTHERS NOT IN TOP 5' AS GROUPER, DRTR.* FROM DRTR WHERE RANK > 5 AND NAME <> 'ÚNKNOWN'
cheers,
-jamie