MS Access 中的循环引用答案

【问题标题】：Circular Reference in MS AccessMS Access 中的循环引用
【发布时间】：2013-05-19 07:46:09
【问题描述】：

我在 Microsoft Access SQL 中遇到循环引用错误。

SELECT a.PlateNo, a.colm, a.alain
FROM (SELECT PlateNo, alain, min(InspectionDate) AS colm
      FROM [Vehicle Spot Check] GROUP BY PlateNo)
  AS a
INNER JOIN [Vehicle Spot Check] AS m
ON (a.alain = m.WithoutDefects) AND (a.colm = m.InspectionDate)
  AND (a.PlateNo = m.PlateNo);

我收到此错误：

Circular reference caused by alias '' in query definition's Select List.

我不知道是哪一个，因为没有指定字段。我的主要嫌疑人是m.WithoutDefects，但我已经仔细检查过了。有没有办法找到这个？我在想的也是“Inner Join”之后的语法问题。

【问题讨论】：

标签： sql ms-access ms-access-2007

【解决方案1】：

我怀疑这与您的“AS”中的一个或两个有关。如果您有一个名为colm 或m 的列，则不能将“AS”的结果命名为当前列值。尝试将colm 和m 替换为其他内容，例如colm_ 和m_：

SELECT a.PlateNo, a.colm, a.alain
FROM (SELECT PlateNo, alain, min(InspectionDate) AS colm_
      FROM [Vehicle Spot Check] GROUP BY PlateNo)
  AS a
INNER JOIN [Vehicle Spot Check] AS m_
ON (a.alain = m.WithoutDefects) AND (a.colm = m.InspectionDate)
  AND (a.PlateNo = m.PlateNo);

【讨论】：

【解决方案2】：

我是来自印度的Bhanu Bhanot

使用这个

选择 E.id 作为 ID， E.dte AS 日期， E.Billno AS 'Bill No', E.LRno AS 'LR 编号', P1.PartyName AS '发送方', 数量， E.PVT_Marka AS 'PVT Marka', P2.PartyName AS '接收方'， E.金额， E.CGST, E.SGST, E.IGST, E.TotalAmount AS '总金额' FROM(Entry AS E INNER JOIN Party AS P1 ON E.PartySenderId = P1.id) LEFT JOIN Party AS P2 ON E.PartyReceiverId = P2.id ORDER BY E.id;

不是这个

选择 ID 作为 ID， E.dte AS 日期， E.Billno AS 'Bill No', E.LRno AS 'LR 编号', P1.PartyName AS '发送方', 数量， E.PVT_Marka AS 'PVT Marka', P2.PartyName AS '接收方'， E.金额， E.CGST, E.SGST, E.IGST, E.TotalAmount AS '总金额' FROM(Entry AS E INNER JOIN Party AS P1 ON E.PartySenderId = P1.id) LEFT JOIN Party AS P2 ON E.PartyReceiverId = P2.id ORDER BY id;

原因

id 字段存在于Entry 和Party 表中。识别表应该指定E.id而不是id

它正在工作..

【讨论】：