MS Access数据库中的SQL查询错误

Question

我需要在MS Access中执行sql查询。

但是我在MS Access中遇到错误：

SELECT * 
FROM 
(
   SELECT * 
   FROM table1
   where not exists 
   (
     SELECT *  
     FROM table2
     where table2.id = table1.id
   ) as t
 )  as t1, table3
 where  table3.id = t1.id

语法错误：查询表达式“不存在（...）作为t”中​​的（缺少运算符）

任何帮助，将不胜感激。

Answer 1

不存在子选择不需要别名。 请注意，我已经删除了as t

SELECT * 
FROM 
(
   SELECT * 
   FROM table1
   where not exists 
   (
     SELECT *  
     FROM table2
     where table2.id = table1.id
   ) 
 )  as t1, table3
 where  table3.id = t1.id

您还可以考虑使用inner join和left join来摆脱not exists ：

这应该与上述内容完全相同：

SELECT t1.*, t3.* 
FROM 
  table1 t1 
  inner join table3 t3 on t1.id = t3.id
  left join table2 t2 on t1.id = t2.id
where
  t2.id is null