sql – 具有空值的外连接表的累积和

2023年3月12日 295次阅读

我有一个包含2个日期列的表,分别代表JIRA项的创建和关闭.对于报告,我需要获取每个日期和累计的已创建和已关闭项目的数量.

但是在某些日期没有创建或关闭的项目,因此完整的外部联接返回空值.这导致累积和列中的空值,我无法纠正.

我已经通过合并来尝试了很多不同的事情：

Select
    coalesce(A.createdate, B.closedate) datum
    ,COALESCE(A.created, 0) created
    ,COALESCE(B.closed,0) closed
    ,sum(created) OVER(ORDER BY A.createdate ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) cumSum
    ,sum(coalesce(created,0)) OVER(ORDER BY A.createdate ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) cumSum2
    ,COALESCE(sum(created) OVER(ORDER BY A.createdate ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW),0) cumSum3
    ,sum(coalesce(created,0)) OVER(ORDER BY A.createdate ROWS BETWEEN UNBOUNDED PRECEDING AND 1 preceding) + coalesce(created,0) cumSum4
from
(SELECT convert(date,[Created]) createdate, COUNT(*) created
  FROM [jira].[dbo].[report_clean_full]
  group by convert(date,[Created])) A
full outer join (SELECT convert(date,Resolved) closedate, COUNT(*) closed
  FROM [jira].[dbo].[report_clean_full]
  where status = 'Closed'
  group by convert(date,Resolved)) B
on A.createdate = B.closedate
order by 1

结果

2012-08-17  1   0   1   1   1   1
2012-08-23  1   0   2   2   2   2
2012-08-30  4   0   6   6   6   6
2012-09-03  1   0   7   7   7   7
2012-09-06  25  0   32  32  32  32
2012-09-07  30  3   62  62  62  62
2012-09-10  11  6   73  73  73  73
2012-09-11  6   1   79  79  79  79
2012-09-13  1   0   80  80  80  80
2012-09-14  10  1   90  90  90  90
2012-09-17  7   1   97  97  97  97
2012-09-18  4   2   101 101 101 101
2012-09-19  4   2   105 105 105 105
2012-09-20  19  5   124 124 124 124
2012-09-21  12  0   136 136 136 136
2012-09-24  7   1   143 143 143 143
2012-09-26  0   7   NULL    0   0   0
2012-09-27  18  2   161 161 161 161
2012-09-28  7   0   168 168 168 168
2012-10-01  4   1   172 172 172 172

在2012-09-26只有物品关闭,但我希望cumSum显示143而不是0(并最终重复关闭项目和减去得到开放项目的nr.)

谁能解释我做错了什么？

最佳答案 类似于我对gpn评论的回应：

解决方案是在OVER()中合并ORDER BY的日期.据我所知,问题不是值本身,而是NULL范围.

sum(coalesce(created,0)) OVER(ORDER BY coalesce(A.createdate,b.closedate) ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) cumSumCreated
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