我有一张桌子.我想获得每个独特的CoatingChambersID的最后一行.有24个独特的腔室,最后一行表示腔室处于最后状态的时间.
我可以得到一个如此独特的列表:
SELECT distinct CoatingChambersID, MAX(LastDT) as LastDT
FROM [REO].[dbo].[CoatingChamberStateLogs]
group by CoatingChambersID
但我无法弄清楚如何将其加入到原始表中.
在此先感谢您的帮助!
CoatingChamberStateLogsID CoatingChambersID StartDT LastDT IntervalMin CoatingChamberStatesID
1001712 1003 2017-01-24 23:09:29.4632108 2017-01-25 03:04:32.6758500 235.053543986667 1007
1001713 1006 2017-01-24 23:09:29.4632108 2017-01-25 00:30:30.8478433 81.0230772083333 1007
1001714 1015 2017-01-24 23:09:29.4632108 2017-01-25 04:21:33.7601011 312.071614838333 1007
1001715 1024 2017-01-24 23:09:29.4632108 2017-01-31 04:43:21.5643016 8973.86835151333 1001
1001716 1016 2017-01-24 23:09:29.4632108 2017-01-25 00:01:30.4200122 52.01594669 1006
1001717 1017 2017-01-24 23:09:29.4632108 2017-01-24 23:15:29.8261612 6.00604917333333 1006
1001718 1018 2017-01-24 23:09:29.4632108 2017-01-26 01:42:49.4040548 1593.3323474 1006 0
1001719 1019 …