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Col1  col2 
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B      33     
*      22     

Ä¿µÄ£ºµ±col1 Ϊ A ʱ µÃ³öCOL2ÏàÓ¦µÄÖµ11,µ±col1 Ϊ B ʱ µÃ³öCOL2ÏàÓ¦µÄÖµ33,µ±col2Ϊ D ʱ µÃ³öcol2µÄֵΪ 22£¬± ......

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