分区 a table 并在 google 大查询中获取第一条和最后一条记录

Question

从下面 table，我试图找到每个 Id1 的开始时间和停止时间。例如，对于Id1 = 103，它开始于2016-11-01 10:50:28 UTC，当天车辆停止时间为2016-11-01 11:23:55 UTC。与 id1 = 103 类似，在 2016-12-01，它开始于 2016-12-01 10:51:28 UTC，结束于 2016-12-01 11:28:55 UTC。

        Id1 Id2 StartTime                 StartDate   StopTime                StopDate    DateTime   
    1   103 314 2016-11-01 10:50:28 UTC 2016-11-01  2016-11-01 11:22:35 UTC 2016-11-01  2016-11-01 10:50:32 UTC  
    2   103 315 2016-11-01 10:50:28 UTC 2016-11-01  2016-11-01 11:22:48 UTC 2016-11-01  2016-11-01 10:50:49 UTC  
    3   103 316 2016-11-01 10:50:28 UTC 2016-11-01  2016-11-01 11:22:55 UTC 2016-11-01  2016-11-01 10:50:54 UTC  
    4   103 317 2016-11-01 10:50:28 UTC 2016-11-01  2016-11-01 11:23:55 UTC 2016-11-01  2016-11-01 10:51:03 UTC  
    5   103 318 2016-12-01 10:51:28 UTC 2016-12-01  2016-12-01 11:24:15 UTC 2016-12-01  2016-12-01 10:51:19 UTC  
    6   103 319 2016-12-01 10:52:28 UTC 2016-12-01  2016-12-01 11:25:55 UTC 2016-12-01  2016-12-01 10:51:24 UTC  
    7   103 320 2016-12-01 10:53:28 UTC 2016-12-01  2016-12-01 11:26:55 UTC 2016-12-01  2016-12-01 10:51:31 UTC  
    8   103 321 2016-12-01 10:54:28 UTC 2016-12-01  2016-12-01 11:27:55 UTC 2016-12-01  2016-12-01 10:51:40 UTC  
    9   103 322 2016-12-01 10:55:28 UTC 2016-12-01  2016-12-01 11:28:55 UTC 2016-12-01  2016-12-01 10:51:43 UTC  

    Output:
        Id1 StartTime                 StartDate   StopTime                StopDate    
    1   103 2016-11-01 10:50:28 UTC 2016-11-01  2016-11-01 11:23:55 UTC 2016-11-01  
    5   103 2016-12-01 10:51:28 UTC 2016-12-01  2016-12-01 11:28:55 UTC 2016-12-01

我尝试了以下查询，但不确定为什么它不起作用：

          SELECT Id1, Date, StartTime, StopTime 
          FROM(
          SELECT
            Id1,
            DATE(DateTime) AS Date,
            FIRST_VALUE(StartTime) OVER (PARTITION BY Id1, DATE(DateTime)  ORDER BY DateTime) AS StartTime,
            LAST_VALUE(StopTime) OVER (PARTITION BY Id1, DATE(DateTime) ORDER BY DateTime ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING) AS StopTime,
          FROM
            TestSridevi.ET_Time_Leaving)
          GROUP BY Id1, Date, StartTime, StopTime
          ORDER BY Id1

Answer 1

试试下面

#standardSQL
WITH yourTable AS (
  SELECT 103 AS Id1, 314 AS Id2, '2016-11-01 10:50:28 UTC' AS StartTime, '2016-11-01' AS StartDate, '2016-11-01 11:22:35 UTC' AS StopTime, '2016-11-01' AS StopDate, '2016-11-01 10:50:32 UTC' AS DateTime UNION ALL  
  SELECT 103, 315, '2016-11-01 10:50:28 UTC', '2016-11-01', '2016-11-01 11:22:48 UTC', '2016-11-01', '2016-11-01 10:50:49 UTC' UNION ALL  
  SELECT 103, 316, '2016-11-01 10:50:28 UTC', '2016-11-01', '2016-11-01 11:22:55 UTC', '2016-11-01', '2016-11-01 10:50:54 UTC' UNION ALL  
  SELECT 103, 317, '2016-11-01 10:50:28 UTC', '2016-11-01', '2016-11-01 11:23:55 UTC', '2016-11-01', '2016-11-01 10:51:03 UTC' UNION ALL  
  SELECT 103, 318, '2016-12-01 10:51:28 UTC', '2016-12-01', '2016-12-01 11:24:15 UTC', '2016-12-01', '2016-12-01 10:51:19 UTC' UNION ALL  
  SELECT 103, 319, '2016-12-01 10:52:28 UTC', '2016-12-01', '2016-12-01 11:25:55 UTC', '2016-12-01', '2016-12-01 10:51:24 UTC' UNION ALL  
  SELECT 103, 320, '2016-12-01 10:53:28 UTC', '2016-12-01', '2016-12-01 11:26:55 UTC', '2016-12-01', '2016-12-01 10:51:31 UTC' UNION ALL  
  SELECT 103, 321, '2016-12-01 10:54:28 UTC', '2016-12-01', '2016-12-01 11:27:55 UTC', '2016-12-01', '2016-12-01 10:51:40 UTC' UNION ALL  
  SELECT 103, 322, '2016-12-01 10:55:28 UTC', '2016-12-01', '2016-12-01 11:28:55 UTC', '2016-12-01', '2016-12-01 10:51:43 UTC'   
)
SELECT
  Id1,
  MIN(StartTime) AS StartTime,
  StartDate,
  MAX(StopTime) AS StopTime,
  StopDate
FROM yourTable
GROUP BY Id1, StartDate, StopDate
ORDER BY Id1, StartDate, StopDate

结果是

Id1               StartTime  StartDate                 StopTime   stopDate   
103 2016-11-01 10:50:28 UTC 2016-11-01  2016-11-01 11:23:55 UTC 2016-11-01   
103 2016-12-01 10:51:28 UTC 2016-12-01  2016-12-01 11:28:55 UTC 2016-12-01

分区 a table 并在 google 大查询中获取第一条和最后一条记录

Partition a table and get first and last records in google big query

google-bigquery

partition