复杂的交叉表查询问题

Question

我有以下 2 个表：

1) Companies

ID      CompanyName      Abbreviation     Notes  
1        CompanyA             CA          ...  
2        CompanyB             CB          ...  
3        CompanyC             CC          ...

2) PlannedDeployments

ID      CompanyID      TypeID      DepDate      NumDeployed  
1          1             2         09/2010          5  
2          1             2         10/2010          5
3          1             3         09/2010          3
4          1             3         10/2010          3
5          1             4         10/2010          4
6          2             2         12/2010          10
7          2             4         10/2010          1
8          3             2         11/2010          6

请注意，TypeID 是 1 到 5 之间的数字，描述正在部署的人员类型。出于此查询的目的，我对每个公司的类型 2 员工感兴趣，然后对类型 3 和类型 3 的总和感兴趣。每个日期 4 个。我最终想要得到的是一个如下所示的交叉表：

交叉表

Date/Company    CompanyA    CompanyB    CompanyC     SumOfTypes3and4
09/2010            5                                        3
10/2010            5                                        8
11/2010                                    6                
12/2010                        10

问题是最后一列 - 类型 3 和类型 4 员工的总和。我当前的交叉表包括除 sum 列之外的所有内容，如下所示：

TRANSFORM Sum(PlannedDeployments.NumDeployed) AS ["NumDeployed"]
SELECT PlannedDeployments.DepDate
FROM PlannedDeployments LEFT JOIN Companies ON Companies.ID=PlannedDeployments.CompanyID
WHERE PlannedDeployments.TypeID=2 AND (PlannedDeployments.DepDate Between FormFieldValue("Form", "Control") AND FormFieldValue("Form", "Control"))
GROUP BY PlannedDeployments.DepDate
PIVOT Companies.CompanyName;

WHERE 子句的第二部分只是通过某些表单控件限制数据。不管怎样——我在获得最后一篇专栏时遇到了很多麻烦。有人有什么想法吗？

编辑：基于下面 Remou 提供的解决方案，最终查询结果如下：

TRANSFORM Sum(PlannedDeployments.NumDeployed) AS ["NumDeployed"]
SELECT PlannedDeployments.DepDate, q.SumOfNumDeployed
FROM (SELECT PlannedDeployments.DepDate, Sum(PlannedDeployments.NumDeployed) AS SumOfNumDeployed
FROM PlannedDeployments
WHERE (((PlannedDeployments.[TypeID]) In (3,4)))
GROUP BY PlannedDeployments.DepDate) AS q 
RIGHT JOIN (PlannedDeployments 
INNER JOIN Companies ON PlannedDeployments.CompanyID = Companies.ID) 
ON q.DepDate = PlannedDeployments.DepDate
WHERE PlannedDeployments.TypeID=2 
   AND (PlannedDeployments.DepDate Between FormFieldValue("Form", "Control") 
   AND FormFieldValue("Form", "Control"))
GROUP BY PlannedDeployments.DepDate, q.SumOfNumDeployed
PIVOT Companies.CompanyName;

Answer 1

您可以使用子查询：

TRANSFORM Sum(PlannedDeployments.NumDeployed) AS ["NumDeployed"]
SELECT PlannedDeployments.DepDate, Sum(q.SumOfNumDeployed) AS SumOfSumOfNumDeployed
FROM (SELECT PlannedDeployments.DepDate, Sum(PlannedDeployments.NumDeployed) AS SumOfNumDeployed
FROM PlannedDeployments
WHERE (((PlannedDeployments.[TypeID]) In (3,4)))
GROUP BY PlannedDeployments.DepDate) AS q 
RIGHT JOIN (PlannedDeployments 
INNER JOIN Companies ON PlannedDeployments.CompanyID = Companies.ID) 
ON q.DepDate = PlannedDeployments.DepDate
WHERE PlannedDeployments.TypeID=2 
   AND (PlannedDeployments.DepDate Between FormFieldValue("Form", "Control") 
   AND FormFieldValue("Form", "Control"))
GROUP BY PlannedDeployments.DepDate
PIVOT Companies.CompanyName;