我下面的表格有選擇分鐘(值)形成的每一天
DATE_TIME,data_value
date_time data_value
----------------------- ----------------------
2011-03-28 15:05:29.000 20
2011-03-28 15:55:39.000 40
2011-03-28 16:25:45.000 30
2011-03-28 23:37:11.000 10
2011-03-29 04:43:12.000 44
2011-03-29 05:13:18.000 55
2011-03-29 05:28:21.000 52
2011-03-29 05:48:25.000 23
2011-03-29 06:13:30.000 8
2011-03-29 07:03:40.000 34
2011-03-29 08:34:01.000 25
2011-03-29 09:34:20.000 35
2011-03-29 09:49:23.000 23
2011-03-30 16:00:55.000 20
我想獲得在SQL每個日期的最低值:
有什麼建議嗎?
哪個數據庫平臺? – 2011-05-09 10:41:54