获取Access中特定列为空的所有记录

Question

我在Access中编写一个查询,我必须获取特定列为空的所有记录,我该怎么做？

这是我认为它应该是,但它不起作用.

SELECT *
FROM TABLE
WHERE PARTICULARCOLUMN = ''

Answer 1

这将处理列中的空字符串('')和NULL值.

SELECT *
FROM TABLE
WHERE Nz(PARTICULARFIELD,'') = ''

Answer 2

尝试...

WHERE PARTICULARFIELD Is Null 

来自Web的样本:

SELECT [Table1].[CustomerID], [Table2].[CustomerID]
FROM [Table1] LEFT JOIN [Table2] ON [Table1].[CustomerID] = [Table2].[CustomerID]
WHERE ((([Table 2].[CustomerID]) Is Null));

请参阅:http: //www.fabalou.com/access/Queries/isnullquery.asp