Return 基于 aggr() 答案的关联字段？

Question

所以我遇到了这个问题，我们想找出每个班次哪台机器最后开始工作。 IE。哪台机器是最后注册负载的。所以这个

max(aggr(min({<ACTIVITY={'Loading'}>}[RECORD START TIME]),
       [CYCLE RECORD SHIFT],[CYCLE PRIMARY MACHINE]))

给了我正确的时间，但现在我也想 return 机器名。

这是一个数据样本

load * inline [
ACTIVITY,CYCLE PRIMARY MACHINE,CYCLE RECORD SHIFT,CYCLE SHIFT START TIME,RECORD START TIME
Loading,DT90015,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 11:45:17
Loading,DT90015,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 12:02:14
Loading,DT90015,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 12:21:32
Loading,DT90023,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 08:12:48
Loading,DT90023,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 08:50:43
Loading,DT90023,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 09:17:27
Loading,DT90023,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 09:53:19
Loading,DT90023,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 11:51:52
Loading,DT90023,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 12:07:09
Loading,DT90023,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 12:29:23
Loading,DT90024,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 08:08:54
Loading,DT90024,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 08:24:51
Loading,DT90024,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 08:40:15
Loading,DT90024,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 09:02:07
Loading,DT90024,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 09:25:59
Loading,DT90024,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 09:57:36
Loading,DT90024,2016/02/25.0,25/02/2016 07:00:00,25/02/2016 12:37:09
];

感谢 Eldad 的建议，但return是这样的：

我可能应该在我的原始问题中包含我想创建的 table

Answer 1

创建一个新变量"vMax"并赋值

=Timestamp(max(aggr(min({<ACTIVITY={'Loading'}>}[RECORD START TIME]),
   [CYCLE RECORD SHIFT],[CYCLE PRIMARY MACHINE])) )

然后用这个计算器得到机器名：

=MaxString({<[RECORD START TIME]={'$(vMax)'}>}[CYCLE PRIMARY MACHINE])

Answer 2

抱歉耽搁了，所以 here 是一个可行的解决方案，基本上在您的脚本中，您需要创建另一个聚合的 table，例如

LastMachine:
Load [CYCLE RECORD SHIFT], max([RECORD START TIME]) as max_ts Resident Data group by [CYCLE RECORD SHIFT];
left join
Load [CYCLE RECORD SHIFT],[RECORD START TIME] as max_ts, [CYCLE PRIMARY MACHINE] as Last_Machine Resident Data;

然后你得到

Return 基于 aggr() 答案的关联字段？

Return an associated field based on an aggr() answer?

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