雪花中两个日期之间的工作时间

Question

如何在不创建表格的情况下计算雪花中两个日期之间的工作时间？我尝试过像 (datediff) 和时间戳这样的函数，但我无法找到解决方案

我想得到类似的东西

+---------------------+---------------------+---------------+
|       create_Task   |        Solved_Task  | BusinessHours |
+---------------------+---------------------+---------------+
| 2012-03-05 09:00:00 | 2012-03-05 15:00:00 |  6.000000     |
| 2012-03-05 10:00:00 | 2012-03-06 10:00:00 |  8.000000     |
| 2012-03-05 11:00:00 | 2012-03-06 10:00:00 |  7.000000     |
| 2012-03-05 10:00:00 | 2012-03-06 15:00:00 | 13.000000     |
| 2012-03-09 16:00:00 | 2012-03-12 10:00:00 |  2.000000     |
| 2012-03-06 16:00:00 | 2012-03-15 10:00:00 | 50.000000     |
| 2012-03-09 16:00:00 | 2012-03-19 10:00:00 | 42.000000     |
+---------------------+---------------------+---------------+

我想指定工作时间，以便我可以计算工作时间

Answer 1

一种方法是创建工作时间表。然后你可以运行一个相当简单的查询：

select
  t.id
  , sum(datediff(‘second’, 
               -- calculate the max of the two start time
               (case when t.start <= 
                          w.working_day_start_timestamp
                     then w.working_day_start_timestamp
                     else t.start
                end),
               -- calculate the min of the two end times
               (case when t.end >= 
                          w.working_day_end_timestamp
                     then w.working_day_end_timestamp
                     else t.end 
                end)
               )) / 3600 -- convert to hourly
  as working_hour_diff
from 
  working_days_times w,
  cross join time_intervals t
where -- select all intersecting intervals
  (
   t.start <= w.working_day_end_timestamp
   and
   t.end >= w.working_day_start_timestamp
  )
and -- select only working days
  w.is_working_day
group by
  t.id

如果需要函数，本文介绍了在雪花中实现一个Javascript UDF：https : //medium.com/dandy-engineering-blog/how-to-calculate-the-number-of-working-hours-between- sql-b5696de66e51 中的两个时间戳