这是我的表...我需要计算每个日期最后一列的实例。
所以基本上需要
date Count
2015-02-02 8
2015-02-03 10
2015-02-02 01:30:00 PM 1
2015-02-02 02:30:00 PM 1
2015-02-02 03:30:00 PM 1
2015-02-02 05:30:00 PM 1
2015-02-02 06:30:00 PM 1
2015-02-02 08:30:00 AM 1
2015-02-02 09:30:00 AM 1
2015-02-02 11:30:00 AM 1
2015-02-03 01:30:00 PM 2
2015-02-03 02:30:00 PM 2
2015-02-03 03:30:00 PM 2
2015-02-03 04:30:00 PM 2
2015-02-03 05:30:00 PM 2
2015-02-03 06:30:00 PM 2
2015-02-03 08:30:00 AM 2
2015-02-03 09:30:00 AM 2
2015-02-03 10:30:00 AM 2
2015-02-03 11:30:00 AM om 2
2015-02-04 01:30:00 PM 3
2015-02-04 02:30:00 PM 3
2015-02-04 03:30:00 PM 3
2015-02-04 05:30:00 PM 3
2015-02-04 06:30:00 PM 3
2015-02-04 08:30:00 AM 3
2015-02-04 09:30:00 AM 3
2015-02-04 10:30:00 AM 3
2015-02-04 11:30:00 AM 3
2015-02-05 01:30:00 PM 4
2015-02-05 02:30:00 PM 4
2015-02-05 03:30:00 PM 4
2015-02-05 04:30:00 PM 4
2015-02-05 05:30:00 PM 4
2015-02-05 06:30:00 PM 4
2015-02-05 08:30:00 AM 4
2015-02-05 09:30:00 AM 4
2015-02-05 10:30:00 AM 4
2015-02-05 11:30:00 AM 4
2015-02-06 01:30:00 PM 5
2015-02-06 02:30:00 PM 5
2015-02-06 08:30:00 AM 5
2015-02-06 09:30:00 AM 5
2015-02-06 10:30:00 AM 5
2015-02-06 11:30:00 AM 5
答案 0 :(得分：0)
select DATE(datecolumn) as thedate, count(lastcol) from sometable group by thedate