怎样将数据合并！原数据如下所示：
BJID JD1 KSSJ JSSJ JD2 KSSJ JSSJ
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1 1 2007-04-12 2007-05-02
1001-1 1 2007-04-12 2007-04-18
1001-1 2 2007-04-18 2007-05-02
1001-2 1 2007-04-12 2007-04-20
1001-2 2 2007-04-20 2007-05-02
合并好的数据是这样的！
BJID JD1 KSSJ JSSJ JD2 KSSJ JSSJ
-------------------------------------------------------------------------
1 1 2007-04-12 2007-05-02
1001-1 1 2007-04-12 2007-04-18 2 2007-04-18 2007-05-02
1001-2 1 2007-04-12 2007-04-20 2 2007-04-20 2007-05-02
------解决方案--------------------------------------------------------
接分