我有这样一张桌子:
Column = NAME
Column = DATE
NAME | DATE | Y/N
John | 01/01/2012 | bit
Mary | 01/01/2012 | bit
James | 01/01/2012 | bit
John | 01/02/2012 | bit
Mary | 01/02/2012 | bit
James | 01/02/2012 | bit
John | 01/03/2012 | bit
Mary | 01/03/2012 | bit
James | 01/03/2012 | bit
我想创建某种形式的矩阵或枢轴,所以我最终得到这个:
NAME | 01/01/2012 | 01/02/2012 | 01/03/2012
John | bit | bit | bit
Mary | bit | bit | bit
James …