Question

在MS Access数据库中，我尝试在三个有条件的表上进行连接。

我目前的做法不起作用：

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因为表P中没有表A中相应条目的数据集（条件：A。[NUMMER] = VAL（P。[PLUX]））不会被返回。

我尝试了一种JOIN方法但我找不到合适的语法。

Answer 1

谢谢@Gustav GUI设计师帮助（甚至不知道它存在 - 到目前为止只使用了SQL）。

SELECT P.ColumnX, A.ColumnY, R.ColumnZ
FROM (P LEFT OUTER JOIN A.[NUMBER]) = VAL(P.[PLUX]))
INNER JOIN R ON P.[PRGUID] = R.[RGUID]
WHERE R.[TIMEST] > #yyyy-MM-dd HH:mm:ss# 
AND  R.[TIMEST] < #yyyy-MM-dd HH:mm:ss#

MS Access：加入三个有条件的表

1 个答案: