具有分组依据和条件的MS Access Union查询

Question

我有以下查询，并且需要与另一个具有完全相同字段的表进行联合。 但是，该标准可以涵盖两个表中的信息。

关于如何与小组成员和准则进行合并的任何想法？

SELECT sporderpipeline.coordinator, 
       sporderpipeline.[update date], 
       Count(sporderpipeline.loan_number) AS CountOfLoan_Number, 
       sporderpipeline.[data source] 
FROM   sporderpipeline 
GROUP  BY sporderpipeline.coordinator, 
          sporderpipeline.[update date], 
          sporderpipeline.status, 
          sporderpipeline.[data source] 
HAVING ( ( ( sporderpipeline.[update date] ) BETWEEN #8/23/2015# AND #8/24/2015# 
         ) 
         AND ( ( sporderpipeline.status ) IS NOT NULL ) ); 

Answer 1

您不需要为这些条件使用HAVING子句HAVING仅对于基于诸如COUNT或SUM之类的聚合函数的条件是必需的。

编写UNION查询的最简单方法如下：

SELECT [sporderpipeline].[coordinator], 
       [sporderpipeline].[update date], 
       Count([sporderpipeline].[loan_number]) AS CountOfLoan_Number, 
       [sporderpipeline].[data source] 
FROM   sporderpipeline 
WHERE  [update date] BETWEEN #8/23/2015# AND #8/24/2015# 
       AND status IS NOT NULL 
GROUP  BY [sporderpipeline].[coordinator], 
          [sporderpipeline].[update date], 
          [sporderpipeline].[status], 
          [sporderpipeline].[data source] 
UNION 
SELECT [sporderpipeline].[coordinator], 
       [sporderpipeline].[update date], 
       Count([sporderpipeline].[loan_number]) AS CountOfLoan_Number, 
       [sporderpipeline].[data source] 
FROM   sporderpipeline 
WHERE  [update date] BETWEEN #8/23/2015# AND #8/24/2015# 
       AND status IS NOT NULL 
GROUP  BY [sporderpipeline].[coordinator], 
          [sporderpipeline].[update date], 
          [sporderpipeline].[status], 
          [sporderpipeline].[data source] 

话虽如此，它也可以与不与UNION不兼容的HAVING子句一起使用。

Answer 2

创建伴随查询。 我们将其称为MyQuery_Second 。

SELECT * FROM MyQuery_First UNION SELECT * FROM MyQuery_Second;

...甚至可能...

MyQuery_First UNION MyQuery_Second;

它应该工作。