我在Ms Sql 2008中有2个数据列
uniqueidentifier列作为ID和datetime列,其结果如下.
2011-11-06 18:02:18.030
2011-11-06 18:02:18.373
2011-11-06 18:02:57.560
2011-11-06 18:02:58.593
2011-11-06 18:03:01.717
2011-11-06 18:03:02.373
2011-11-06 18:03:03.407
除了ID列的复杂性.我只对基于om间隔的数据进行分组感兴趣
minutes(1,5,10,15,30)
hours (1,2)
days(1,5,10)
months(1,2)
结果应该是浮动的,否则每个间隔仅产生1个唯一如下
2011-11-06 18:02:00 (1 Minute)
2011-11-06 18:03:00 (1 Minute)
2011-11-06 18:04:00 (1 Minute)
2011-11-06 18:05:00 (1 Minute)
2011-11-06 18:06:00 (1 Minute)
或者每天
2011-11-06 00:00:00 (1 Day)
2011-11-07 00:00:00 (1 Day)
2011-11-08 00:00:00 (1 Day)
2011-11-09 00:00:00 (1 Day)
2011-11-10 00:00:00 (1 Day)
等等
任何建设性的建议都会受到欢迎.