SQL查詢表達式中的錯誤

Question

我試圖在Access 2010上運行以下SQL代碼，但它在查詢表達式中返回語法錯誤。任何想法可能會導致它？

在此先感謝。

DELETE FROM Trn_done 
WHERE (Trn_done.training = 
SELECT Training 
FROM Trainings 
WHERE (Trainings.Area = '" & Area & "')) 

Answer 1

支架應該是嵌套的SQL前下方

DELETE FROM Trn_done 
WHERE Trn_done.training IN (
    SELECT Training 
    FROM Trainings 
    WHERE (Trainings.Area = '" & Area & "') 
) 

Answer 2

您不應該等於選擇語句，以免選擇多行導致您的代碼中斷。試試這個：

DELETE td 
from Trn_done td 
inner join Trainings t 
on td.training = t.training 
WHERE t.Area = '" & Area & "'