When grouping by_time, all records that share a common_timevalue are grouped into individual tables. So each output table represents a single point in time. Group by time output tables Table: keys: [_time] _time:time _start:time _stop:time _value:float _field:string _measurement:string cp...
SELECT DERIVATIVE(SUM(water_level),6m) FROM h2o_feet WHERE location = 'santa_monica' AND time >= '2015-08-18T00:00:00Z' AND time < '2015-08-18T00:36:00Z' GROUP BY time(18m) SELECT DERIVATIVE(SUM(water_level),6m) FROM h2o_feet WHERE location = 'santa_monica' AND time >= '20...
This function is intended to be used when timeColumn (_time by default) is not in the group key. If timeColumn is in the group key, resulting output is confusing and generally not useful. Window by calendar months and years every, period, and offset parameters support all valid duration ...
在下一个操作中需要一个 _time 列。要添加一个,请使用 duplicate() 函数将 _stop 列复制为每个窗口表的 _time 列。 from(bucket:"telegraf/autogen")|>range(start:-1h)|>filter(fn:(r)=>r._measurement=="cpu"andr._field=="usage_system"andr.cpu=="cpu-total")|>window(every:5m)|>mean()|>...
响应式编程基于reactor(Reactor 是一个运行在 Java8 之上的响应式框架)的思想,当你做一个带有一定延迟的才能够返回的io操作时,不会阻塞,而是立刻返回一个流,并且订阅这个流,当这个流上产生了返回数据,可以立刻得到通知并调用回调函数处理数据。 电子表格程序就是响应式编程的一个例子。单元格可以包含字面值或类似"...
AND "P-status" = 'ERROR') AND time >= now() - 1m GROUP BY time(500ms), "Node" fill(0) ) 在这种情况下,如果内部查询返回 浏览2提问于2019-02-21得票数 1 1回答 Grafana仪表板使用start:${__from},停止:${__to}停止工作 、、 ...
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像跨度量数学操作、top N、time shift、group by 和按值排序这样的请求功能都有可能在这个初始 alpha 版本中实现。创建一门新的语言和一个新的查询引擎是一项艰巨而又重要的任务,不过我们的努力已经开始为我们带来回报。例如,可以看一下 count 是如何实现的 (https://github.com/influxdata/flux/blob/master/...
et par valeurIntervalle de tempsde 30 secondes. Les requêtes temporelles doivent indiquer le mode de calcul du temps. À l’aide de la clauseTIMESTAMP BY, vous avez spécifié la colonneOUTPUTTIMEpour associer les valeurs de temps avec l’ensemble des calculs temporels. Pour obtenir des ...
SELECT System.Timestamp AS WindowTime, SUM(tr.TipAmount) / SUM(tr.TripDistanceInMiles) AS AverageTipPerMile INTO [TaxiDrain] FROM [Step3] tr GROUP BY HoppingWindow(Duration(minute, 5), Hop(minute, 1)) Stream Analytics fournit plusieursfonctions de fenêtrage. Une fenêtre récurrente a...