请教一个关于海量数据的大文件统计问题
求助大神们~~100分不够再加 http://bbs.csdn.net/topics/390971293
回复讨论(解决方案)
只看到日期列和商户号行，用户id、订单id 在哪里体现出来的？
1、按行读取
2、对第一行分离出日期信息作为结果数组的第二维
3、从第二行开始，分离出商户号（结果数组的第一维）和每日数据对号入座
只看到日期列和商户号行，用户id、订单id 在哪里体现出来的？
1、按行读取
2、对第一行分离出日期信息作为结果数组的第二维
3、从第二行开始，分离出商户号（结果数组的第一维）和每日数据对号入座
您确定看清题意了么 或者我说的不够明白 我要的是统计个数， 并不涉及到订单id， 用户id只在求用户在该商户及日期的维度之前是否有过购买交易。。
用户id 商户id 还有就是订单id
这些不在表中啊。
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