高难度SQL请教 - Oracle / 开发

下面的是SQL的原始数据,我需要下面的结果,怎么写SQL:
ADDRESS CUSTOMER DRDL01 IMSRP1 Amount
10003051 ALPHA START LIMITED POLY COVERED CORE PC 1425501.63
10003051 ALPHA START LIMITED SPUN POLYESTER SP 404370.41
10003051 ALPHA START LIMITED TRILOBAL AIR ENTANGLED POLY TL 9700
10003051 ALPHA START LIMITED SAK COTTON CS 38.3
10003051 ALPHA START LIMITED FILAMENT POLYESTER FP 3960
10003051 ALPHA START LIMITED COTTON COVERED CORE CC 3715.84
要得到的结果:
10003051 ALPHA START LIMITED POLY COVERED CORE PC 1425501.63
10003051 ALPHA START LIMITED SPUN POLYESTER SP 404370.41
10003051 ALPHA START LIMITED OTHERS OTHERS 17414.14

就是按order by ADDRESS,Amount desc ,
然后取前两条记录,后面的用others 代替,汇总金额成第三条记录,
也就是说不管原始记录有多少条,我只能去金额最高的两条和其它的汇总成一条记录,DRDL01变为others 即可.

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-- 太容易了.............

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SQL code:
-- 先把SQL语句贴出来，楼主：下次问问题