Question

希望从我们的GA 360导出中获取对访问者的平均延迟跟踪。

设置以下查询，但收到以下错误，并且我不确定为什么，因为所有这些都是聚合函数： SELECT列表表达式引用hits.latencyTracking.serverResponseTime，它既不在[3：5时也未进行分组或聚合。 ]

select 
TIMESTAMP_SECONDS(visitStartTime) as visitStartTime,
AVG(hits.latencyTracking.serverResponseTime) OVER (PARTITION BY visitid) as avgServerResponseTime,
AVG(hits.latencyTracking.serverConnectionTime) OVER (PARTITION BY visitid) as avgServerConnectionTime,
AVG(hits.latencyTracking.domInteractiveTime) OVER (PARTITION BY visitid) as avgdomInteractiveTime,
AVG(hits.latencyTracking.pageLoadTime) OVER (PARTITION BY visitid) as avgpageLoadTime
from `xxx.xxx.ga_sessions_2018*`,
UNNEST(hits) AS hits
where hits.latencyTracking.serverResponseTime is not null
group by visitStartTime

Answer 1

查询的编写方式-AVG（）不仅是Aggregate Function，而且是Aggregate Analytic Function。

要使其正常工作，您可以删除OVER（），这样AVG（）就会真正成为此处对应于GROUP BY的聚合函数

select 
TIMESTAMP_SECONDS(visitStartTime) as visitStartTime,
AVG(hits.latencyTracking.serverResponseTime) as avgServerResponseTime,
AVG(hits.latencyTracking.serverConnectionTime) as avgServerConnectionTime,
AVG(hits.latencyTracking.domInteractiveTime) as avgdomInteractiveTime,
AVG(hits.latencyTracking.pageLoadTime) as avgpageLoadTime
from `xxx.xxx.ga_sessions_2018*`,
UNNEST(hits) AS hits
where hits.latencyTracking.serverResponseTime is not null
group by visitStartTime

Answer 2

同时使用windows和group by可能会造成混淆。在您的情况下，甚至没有必要，也不需要展平-您可以编写简单的子查询来获取每个会话的号码：

SELECT   
  TIMESTAMP_SECONDS(visitStartTime) AS visitStartTime,
  (
    SELECT AVG(latencyTracking.serverResponseTime) 
    FROM t.hits
    WHERE latencyTracking.serverResponseTime IS NOT NULL) AS avgServerResponseTime,
  (
    SELECT AVG(latencyTracking.serverConnectionTime)
    FROM t.hits
    WHERE latencyTracking.serverConnectionTime IS NOT NULL) AS avgServerConnectionTime,
  (
    SELECT AVG(latencyTracking.domInteractiveTime)
    FROM t.hits
    WHERE latencyTracking.domInteractiveTime IS NOT NULL ) AS avgdomInteractiveTime,
  (
    SELECT AVG(latencyTracking.pageLoadTime)
    FROM t.hits
    WHERE latencyTracking.pageLoadTime IS NOT NULL ) AS avgpageLoadTime
FROM `xxx.xxx.ga_sessions_2018*`

它也不涉及分组，这使分组速度更快。

GA360访问ID上的平均Analytics（分析）功能，用于LatencyTracking

2 个答案: