在会话级汇总Firebase自定义事件

Question

问题：

• 我想创建一个包含Firebase会话，会话持续时间和会话的新表。

为解决此问题，我决定使用Firebase演示数据集来首先查看在示例时间范围内记录了哪些自定义事件，以确定我希望在每个会话级计算哪些两个示例转换事件：< / p>

# Standard SQL
SELECT
event.name as event_name,
COUNT(event.name) as event_count
FROM `firebase-analytics-sample-data.ios_dataset.app_events_*`,
UNNEST(event_dim) as event
WHERE (_TABLE_SUFFIX BETWEEN '20160601' AND '20160605')
------ Inclusive for both the start-date and end-date.
GROUP BY event_name
ORDER BY event_count DESC;

我认为“ slots_spun”和“ user_logged_in”将是一个不错的开始：

重新使用以下code（由@Felipa Hoffa编写），我不仅要在会话级别进行汇总，而且还要确定会话级别的后两个转换事件的计数：

#standardSQL

SELECT app_instance_id, sess_id, MIN(min_time) sess_start, MAX(max_time) sess_end, COUNT(*) records, MAX(sess_id) OVER(PARTITION BY app_instance_id) total_sessions,
   (ROUND((MAX(max_time)-MIN(min_time))/(1000*1000),1)) sess_length_seconds
FROM (
  SELECT *, SUM(session_start) OVER(PARTITION BY app_instance_id ORDER BY min_time) sess_id
  FROM (
    SELECT *, IF(
                previous IS null 
                OR (min_time-previous)>(20*60*1000*1000),  # sessions broken by this inactivity 
                1, 0) session_start 
                #https://blog.modeanalytics.com/finding-user-sessions-sql/
    FROM (
      SELECT *, LAG(max_time, 1) OVER(PARTITION BY app_instance_id ORDER BY max_time) previous
      FROM (
        SELECT user_dim.app_info.app_instance_id
          , (SELECT MIN(timestamp_micros) FROM UNNEST(event_dim)) min_time
          , (SELECT MAX(timestamp_micros) FROM UNNEST(event_dim)) max_time
        FROM `firebase-analytics-sample-data.ios_dataset.app_events_20160601`
      )
    )
  )
)
GROUP BY 1, 2
ORDER BY 1, 2

我正在寻找的输出应如下所示：

我已经测试了几个示例代码片段，但尚未设法解决。

SELECT 
      *, 
      IF(previous IS null
      OR (min_time-previous)>(30*60*1000*1000),  # sessions broken by this inactivity 
      1, 0) session_start,
      COUNT(DISTINCT CASE WHEN event.name = "slots_spun" THEN event.name ELSE NULL END) AS slots_spun      
    FROM (
      SELECT *, LAG(max_time, 1) OVER(PARTITION BY app_instance_id ORDER BY max_time) AS previous
      FROM (
        SELECT 
        user_dim.app_info.app_instance_id,
         (SELECT MIN(timestamp_micros) FROM UNNEST(event_dim)) min_time, 
         (SELECT MAX(timestamp_micros) FROM UNNEST(event_dim)) max_time
        FROM `firebase-analytics-sample-data.ios_dataset.app_events_20160601`, UNNEST(event_dim) AS event
      )
    )

我会继续努力，但是如果有人能指出正确的方向，我将心存感激。