MS ACCESS sql中追加查询的问题

Question

我正在使用MS Access。我写了这个查询...

INSERT INTO survey1 ( [Coach No] )
SELECT pvc1.[Coach No]
FROM pvc1 LEFT JOIN survey1 ON pvc1.[Coach No]=survey1.[Coach No]
WHERE (((survey1.[Coach No]) Is Null));

但是我的表调查1中没有附加数据......

Answer 1

打破查询。只有select会返回任何结果吗？

SELECT pvc1.[Coach No]
FROM pvc1 LEFT JOIN survey1 ON pvc1.[Coach No]=survey1.[Coach No]
WHERE (((survey1.[Coach No]) Is Null))

Answer 2

您的查询没有意义。您正在加入NULL，然后尝试将NULL插入到表中，作为最初来自的PK。您正在survey1加入Coach No，并尝试将Coach No插回survey1您要在此处做什么？

更新现在OP详细阐述了他想要做的事情：

INSERT INTO survey1 ( [Coach No] )
SELECT pvc1.[Coach No]
FROM pvc1 
WHERE pvc1.[Coach No] NOT IN (SELECT [Coach No] FROM survey1 WHERE NOT [Coach No] IS NULL)