Question

我正在尝试添加联接，以允许查询在每个记录中为tbl_ICA.[Abbreviation]和tbl_AssyMoves.[To ICA]显示对应的tbl_AssyMoves.[From ICA]。

（表的相关性如here所示）

我可以得到一个Join来正常工作，但是当我添加第二个Join时

查询表达式't1。[ICA＃] = t。[From ICA] INNER JOIN t1 as t2 ON t2。[ICA＃] = t。[To ICA]
的语法错误（缺少运算符）

似乎没有将第二个JOIN识别为另一个函数。在选择.[Abbreviation]的两个不同实例时，我需要别名。

查询：

SELECT t.[Assy ID], t1.[Abbreviation], t.[From ICA], t2.[Abbreviation], t.[To ICA], t.[To Loc], t.[Date], t.Comments
FROM tbl_AssyMoves As t
INNER JOIN tbl_ICAs As t1
     ON t1.[ICA #]=t.[From ICA]
INNER JOIN t1 As t2
     ON t2.[ICA #]=t.[To ICA]
WHERE ((t.Date Between [Forms]![Form1]![StartDate] And [Forms]![Form1]![EndDate])
**note, additional WHERE criteria omitted for brevity**

Answer 1

在进行连接时（除其他事项外），访问语法与其他dbms不同。
需要括号：

SELECT t.[Assy ID], t1.[Abbreviation], t.[From ICA], t2.[Abbreviation], t.[To ICA], t.[To Loc], t.[Date], t.Comments
FROM (tbl_AssyMoves As t INNER JOIN tbl_ICAs As t1 ON t1.[ICA #]=t.[From ICA])
INNER JOIN t1 As t2 ON t2.[ICA #]=t.[To ICA]
WHERE ((t.Date Between [Forms]![Form1]![StartDate] And [Forms]![Form1]![EndDate])

在MS-Access查询中对两个联接使用别名

1 个答案: