尝试使用内部联接时缺少运算符的语法错误（访问 VBA）

Question

我已经尝试了很长一段时间来修复下面代码中缺少的运算符错误，这是在我添加 INNER JOIN 之后发生的。

感谢任何帮助

Set qdf = CurrentDb.CreateQueryDef("", " SELECT PlantCode, PotSize, WeightToWatch, DateWatered, WeightAfter FROM ListWaterings " & _
    " WHERE DateWatered = (SELECT MAX(T1.DateWatered) FROM ListWaterings AS T1 WHERE T1.PlantCode = ListWaterings.PlantCode) " & _
    " INNER JOIN ListPlants ON ListPlants.PlantCode = ListWaterings.PlantCode "

我试图完成的结果如下

Table 称为 ListPlants（简体）

PlantCode	PotSize	WeightToWatch
18	15	1200
19	22	1450

一个叫 ListWaterings 的 Table

PlantCode	Date Watered	WeightAfter
18	23-03-2022 15:50	1250
19	23-03-2022 15:51	1500
18	23-03-2021 15:50	1300
19	23-03-2021 15:51	1550

我的查询结果看起来像

PlantCode	DateWatered	WeightAfter	Potsize	WeightToWatch
18	23-03-2022 15:50	1250	15	1200
19	23-03-2022 15:51	1500	22	1450

Answer 1

T2 只是

返回的标量值的别名

(SELECT MAX(T1.DateWatered) FROM ListWaterings AS T1 WHERE T1.PlantCode = ListWaterings.PlantCode)

您没有在其他任何地方引用它，所以您真的不需要它，当然也不需要在您的 JOIN 的 ON 子句中。我认为这只是一个错字。也许你的意思是

SELECT PlantCode,
    DateWatered,
    WeightAfter
FROM ListWaterings
WHERE DateWatered =
    (SELECT MAX(T1.DateWatered)
    FROM ListWaterings AS T1
    WHERE T1.PlantCode = ListWaterings.PlantCode)
INNER JOIN ListPlants
ON  ListPlants.PlantCode = ListWaterings.PlantCode

编辑我在 JOIN 之前放错了 WHERE。并且 OP 在输出中添加了更多字段，所以这里应该是正确的语法：

SELECT ListPlants.PlantCode,
    ListWaterings.[DateWatered],
    ListWaterings.WeightAfter,
    ListPlants.PotSize,
    ListPlants.WeightToWatch
FROM ListPlants
INNER JOIN ListWaterings
ON  ListPlants.PlantCode = ListWaterings.PlantCode
WHERE ListWaterings.[DateWatered]=
    (SELECT MAX(T1.DateWatered)
    FROM ListWaterings AS T1
    WHERE T1.PlantCode = ListWaterings.PlantCode)

尝试使用内部联接时缺少运算符的语法错误（访问 VBA）

Syntax error of missing operator when trying to use Inner Join (Access VBA)

ms-access

join