Access 2010：该字段太小，无法接受您尝试添加的数据量而没有DISTINCT

Question

我知道有关此访问错误消息的一些问题，但它们与我的查询不使用DISTINCT关键字无关。

我有两个类似的查询，一个包含信用，另一个包含借方。它们按月和按类别分组。

最终我希望在这两个表上进行完全外连接，以便我可以减去它们以获得每个类别中每个月的结果余额。

然而，Access不允许完全外连接，所以我需要做一个Right OUTER UNION LEFT OUTER NERE。

我现在正尝试在月份和类别ID字段上进行RIGHT OUTER连接。当我在一个字段上执行外连接时，它按预期工作。当我在另一个字段上执行它时，它按预期工作，但当我加入这两个字段时，我得到“字段太小，无法接受您尝试添加的数据量”

表1：

制作人：

SELECT [transactions by category].[categoryid]                    AS CategoryID,
       Format([account transactions].[transaction date], "mm/yy") AS MonthYear,
       Nz(SUM([transactions by category].[amount]), 0)            AS
       [Category Total]
FROM   [transactions by category]
       INNER JOIN [account transactions]
               ON [account transactions].[id] =
                  [transactions by category].[transactionid]
WHERE  [account transactions].[transaction type] <> 8
GROUP  BY Format([account transactions].[transaction date], "mm/yy"),
          [transactions by category].[categoryid]; 

表2：

制作人：

SELECT [transactions by category].[categoryid],
       Format([account transactions].[transaction date], "mm/yy") AS MonthYear,
       Nz(SUM([transactions by category].[amount]), 0)            AS
       [Category Total]
FROM   [transactions by category]
       INNER JOIN [account transactions]
               ON [account transactions].[id] =
                  [transactions by category].[transactionid]
WHERE  [account transactions].[transaction type] = 8
GROUP  BY Format([account transactions].[transaction date], "mm/yy"),
          [transactions by category].[categoryid]; 

正确的加入给了我错误：

SELECT * FROM
  ((SELECT [transactions by category].[categoryid],
           Format([account transactions].[transaction date], "mm/yy") 
              AS MonthYear,
           Nz(SUM([transactions by category].[amount]), 0) AS [Category Total]
    FROM   [transactions by category]
           INNER JOIN [account transactions]
                   ON [account transactions].[id] =
                      [transactions by category].[transactionid]
    WHERE  [account transactions].[transaction type] = 8
    GROUP  BY Format([account transactions].[transaction date], "mm/yy"),
              [transactions by category].[categoryid]) AS [Category Returns]
RIGHT JOIN 
   (SELECT [transactions by category].[categoryid] AS CategoryID,
           Format([account transactions].[transaction date], "mm/yy") 
               AS MonthYear,
           Nz(SUM([transactions by category].[amount]), 0) AS [Category Total]
    FROM   [transactions by category]
           INNER JOIN [account transactions]
                   ON [account transactions].[id] = 
                      [transactions by category].[transactionid]
    WHERE  [account transactions].[transaction type] <> 8
    GROUP  BY Format([account transactions].[transaction date], "mm/yy"),
              [transactions by category].[categoryid]) AS [Category Debits]

ON [Category Returns].[categoryid] = [Category Debits].[categoryid]
   AND [Category Returns].[monthyear] = [Category Debits].[monthyear] ); 

似乎文本字段出现此错误。当我使用Format时，MonthYear字段会变成文本字段吗？即使它仍然只有5个字符长。另外，当我仅加入MonthYear列时，加入工作正常，但只有当我加入两个字段时才会失败。

Answer 1

根据您的标记，您使用的是SQL Server作为后端。您遇到的问题不是来自MS Access，而是来自MS Access和SQL Server的组合。该查询将在纯MS Access环境中工作。 （是的，格式确实会转换为文本。）

您可以使用pass-through queries创建使用SQL Server语法运行的查询，因此您可以使用完全外部联接，或者您可以考虑http://weblogs.sqlteam.com/jeffs/archive/2007/04/19/Full-Outer-Joins.aspx

编辑标签重新更改

如果您的某个字段是备注字段，请参阅http://support.microsoft.com/kb/896950。在像这样的复杂查询中，最好将备注字段减少到255或更少。