Where clause Access 2010 WHERE子句未按预期工作

我在Access 2010中有一个复杂的查询，其中： 查询1是一个查询，其中字段1 8 和 查询2与字段1=8的查询相同

然后我在做：

SELECT * FROM query1 
INNER JOIN query2 ON query1.field2=query2.field2 
WHERE query1.field3=query2.field3

这将返回0个结果

但是，当我将其更改为：

SELECT * from query1 
INNER JOIN query2 ON query1.field2=query2.field2 
WHERE query1.field3=5 AND query2.field3=5

我确实得到了结果。这对任何人都有意义吗？这可能与其中一个字段被视为文本字段有关吗？但它没有引号，所以我不知道为什么会这样

如果你以前看过，请告诉我

这是完整的查询：

SELECT *
FROM   (SELECT [transactions by category].[categoryid],
           Month([account transactions].[transaction date]) AS TransMonth,
           Year([account transactions].[transaction date])  AS TransYear,
           SUM([transactions by category].[amount])         AS Amount
    FROM   (categories
            INNER JOIN [transactions by category]
                    ON categories.id =
           [transactions by category].categoryid)
           INNER JOIN [account transactions]
                   ON [transactions by category].transactionid =
                      [account transactions].id
    WHERE  [account transactions].[transaction type] <> 8
    GROUP  BY [transactions by category].[categoryid],
              Year([account transactions].[transaction date]),
              Month([account transactions].[transaction date])) AS
   TransactionCredits
   INNER JOIN (SELECT [transactions by category].[categoryid],
                      Month([account transactions].[transaction date]) AS
                                         TransMonth,
                      Year([account transactions].[transaction date])  AS
                      TransYear
                                         ,
                      SUM(
          [transactions by category].[amount])
               FROM   (categories
                       INNER JOIN [transactions by category]
                               ON categories.id =
   [transactions by category].categoryid)
                      INNER JOIN [account transactions]
                              ON [transactions by category].transactionid =
                                 [account transactions].id
               WHERE  [account transactions].[transaction type] = 8
               GROUP  BY [transactions by category].[categoryid],
                         Year([account transactions].[transaction date]),
                         Month([account transactions].[transaction date]))
              AS
                                 TransactionDebits
           ON TransactionCredits.[categoryid] =
              TransactionDebits.[categoryid]
WHERE  TransactionCredits.transyear = TransactionDebits.transyear
   AND TransactionCredits.transmonth = 8
   AND TransactionDebits.transmonth = 8; 

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好几个月来，我一直在用头撞墙。我终于找到了解决办法，但我不完全明白为什么会这样

而不是仅仅说

 SELECT * 
 FROM query1 
 INNER JOIN query2 ON query1.field2=query2.field2 
 WHERE query1.field3=query2.field3"

我把WHERE子句改为

VAL(query1.field3)=VAL(query2.field3)

这两个字段最初都是整数ID列，但显然其中一个字段在某个查询中的某个地方变成了某种文本字段

我仍然有兴趣听一个解释这是如何工作的

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感谢

Val在您的示例中将文本字段转换为数字，这意味着您没有数据类型不匹配。你想解释什么？顺便说一句，最好避免使用*来选择字段。