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     °´CB,GDM,CZJMͳ¼Æ
     SELECT CB,GDM,CZJM,COUNT(*)
     from LTJ_DDC
     GROUP BY ROLLUP(CB,GDM,CZJM)
   Èç¹ûÊÇGROUP BY CUBE(A, B, C)£¬(1)ÏȶÔÈ«±í½øÐÐͳ¼Æ£»£¨2£©ÔòÊ×ÏȶÔ(C)½øÐÐGROUP BY£»£¨3£©È»ºóÒÀ´ÎÊǶÔÓÚÿһ¸öB£¬ÏÈͳ¼ÆB,ÔÙͳ¼Æ£¨B,C£©£»£¨4£©¶Ôÿ¸öA£¬°´£¨A£©¡¢£¨A,C£©¡¢(A,B)¡¢£¨A,B,C£©½øÐмìË÷¡£ÊµÀýÈçÏ£º
       SELECT CB,GDM,CZJM,COUNT(*)
       from LTJ_DDC
       GROUP BY CUBE(CB,GDM,CZJM)


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