主题：[求助]sql空值和null的问题

Dim StartDate As Date
Dim EndDate As Date
StartDate =RibbonTabs("基础成本").Groups("查找").Items("开始日期").value
EndDate = RibbonTabs("基础成本").Groups("查找").Items("结束日期").value

Dim filter As String = "1=1"
If startDate <> Nothing Then
    filter &= " and [inputdate] >= #" & StartDate & "#"
End If
If EndDate <> Nothing Then
    filter &= " And [inputdate] <= #" & EndDate & "#"
End If
Dim sts() As String = {"BCID","input","usercode","fullname"}
For Each st As String In sts
    Dim var As String = RibbonTabs("基础成本").Groups("查找").Items(st).text
    If var IsNot Nothing  Then
        var = var.Replace("*","[*]")
        filter =filter & " and " & st & " Like '%" & var & "%'"
    End If
Next
Tables("Basecost").Filter = filter

这个是日期的，如果是下面的集合中的字段呢？比如
Dim sts() As String = {"BCID","input","usercode","fullname"} 这个位置的这些字段