如何使用SQL更新VBA Access中包含NULL值的列？

Question

我正在尝试更新包含Null值的列。我以为波纹管代码可以工作，但由于查询表达式中缺少运算符而出现语法错误。我似乎无法弄清楚。有什么帮助吗？

Private sub dataUpdate_Click()
Dim SQL As String
On Error GoTo cancelledClicked

SQL = "UPDATE table1 " & _
"SET [Column1] = 1 WHERE [Column1] IS NULL " & _
"SET [Column2] = 0 WHERE [Column2] IS NULL; "

DoCmd.RunSQL SQL

exitDataUpdate:
Exit Sub

ignoreError:
MsgBox Err.Description
Exit Sub

cancelledClicked:
If Err.Number = 2501 Then GoTo exitDataUpdate
If Err.Number <> 2501 Then GoTo ignoreError

Resume Next

End sub

Answer 1

这是您想要的逻辑吗？

UPDATE table1 
    SET [Column1] = NZ([Column1], 1),
        [Column2] = NZ([Column2], 0)
    WHERE [Column1] IS NULL OR [Column2] IS NULL

您的代码有语法错误。