Question

我在SQL Server中有一个查询，我试图转换为MS-Access 2003中的查询。该查询旨在用作报告的基础。该报告有两个字段..'案例已分配'和'案例已关闭'。

SELECT 
(SELECT COUNT(*) 
FROM CaseDetail 
WHERE CaseAssignedDate Between '1/1/2008' AND '1/1/2009') as 'Cases Assigned',
(SELECT COUNT(*) 
FROM CaseDetail 
WHERE CaseClosedDate BETWEEN '1/1/2008' AND '1/1/2009') as 'Cases Closed'

我在Access 2003中使用SQL时遇到了困难。为了Access，我已将'字符替换为#，但仍然没有乐趣。 Access是否在SELECT语句中出现SELECT问题？我从Access获得的错误不太有帮助。

Reserved error (-3205); there is no message for this error

此外，如果SQL语句需要从多个表中获取数据，该怎么办？例如......

SELECT 
(SELECT COUNT(*) 
FROM AssignedCases
WHERE CaseAssignedDate Between '1/1/2008' AND '1/1/2009') as 'Cases Assigned',
(SELECT COUNT(*) 
FROM ClosedCases
WHERE CaseClosedDate BETWEEN '1/1/2008' AND '1/1/2009') as 'Cases Closed'

这在SQL中没有问题，但在Access中没有。

Answer 1

我目前还没有可以测试的Windows机器，但这样的事情应该可行。

SELECT SUM(IIF(CaseAssignedDate 
           BETWEEN #1/1/2008# AND #1/1/2009#, 1, 0)) AS CasesAssigned,
       SUM(IIF(CaseClosedDate 
           BETWEEN #1/1/2008# AND #1/1/2009#, 1, 0)) AS CasesClosed
  FROM CaseDetail

根据我的经验，通常最好避免在Access中使用子查询。

编辑：
回应您的评论，我刚刚测试了Access允许这种替代方法：

SELECT *
  FROM
(
SELECT 'CasesAssigned', COUNT(*) AS Total
  FROM AssignedCases
 WHERE CaseAssignedDate BETWEEN #1/1/2008# AND #1/1/2009#

UNION ALL

SELECT 'ClosedCases', COUNT(*) AS Total
  FROM ClosedCases
 WHERE CaseClosedDate BETWEEN #1/1/2008# AND #1/1/2009#
);

EDIT2：
如果您需要一行结果集，littlegreen's answer将会起作用。

Answer 2

我不知道您收到此错误消息的位置，但您的问题是尝试执行Select语句而至少没有表或查询。你需要一些只有一条记录的'虚拟'表来实现这个目标。

SELECT  
    (SELECT COUNT(*)  
     FROM CaseDetail  
     WHERE CaseAssignedDate Between '1/1/2008' AND '1/1/2009'
    ) as 'Cases Assigned', 
    (SELECT COUNT(*)  
     FROM CaseDetail  
     WHERE CaseClosedDate BETWEEN '1/1/2008' AND '1/1/2009'
    ) as 'Cases Closed' 
FROM DummyTableWithOneRecord;

Answer 3

由于您的查询在SQL Server中有效，因此请创建一个使用该查询的Access传递查询（在SQL Server中）并将结果集返回给Access。

或者，根据该SELECT语句创建一个SQL Server视图，并链接到Access中的视图。

由于它已在SQL Server中运行，因此在Access中重新创建查询时看不到任何附加价值。

Answer 4

3205错误是交叉表列标题太多。

这是您的查询解决方案：

SELECT 'Cases Asssigned' as Type, COUNT(*) 
FROM CaseDetail 
WHERE CaseAssignedDate Between '1/1/2008' AND '1/1/2009'
UNION
SELECT 'Cases Closed'as Type, COUNT(*) 
FROM CaseDetail 
WHERE CaseClosedDate BETWEEN '1/1/2008' AND '1/1/2009')

结果将分为两行而不是一行。

Answer 5

在Access和SQL Server中都允许嵌套查询，但至少在SQL Server中，它要求您为嵌套查询设置虚拟别名，并且嵌套查询中的所有列都需要名称。这可能导致错误。

我建议跟随查询：

SELECT q1.CasesAssigned, q2.CasesClosed
FROM 
(SELECT COUNT(*) AS CasesAssigned
FROM CaseDetail 
WHERE CaseAssignedDate Between '1/1/2008' AND '1/1/2009') as q1,
(SELECT COUNT(*) AS CasesClosed
FROM CaseDetail 
WHERE CaseClosedDate BETWEEN '1/1/2008' AND '1/1/2009') as q2

将SQL查询转换为Access查询 - SELECT中的SELECT

5 个答案: