SQL WHERE BETWEEN不选择所有数据

Question

我在一个在范围内工作的应用程序中编写了一个导出（Access to Excel）功能。

用户有4 RadioButtons：A-F，G-M，N-R和S-Z。

我们假设用户已选择rbtnAF，这会将所有客户加载到Customer_Code字段以A，B，C，D，E或F开头的网格中。

加载数据的代码如下：

Dim strFields As String = "[Customer_Addresses].[Cust_Code], [Customers].[Customer_Name], [Customer_Addresses].[Contact_Code], [Customer_Addresses].[Contact_Name], " & _
        "[Customer_Addresses].[Contact_Type], [Customer_Addresses].[Add1], [Customer_Addresses].[Add2], [Customer_Addresses].[Add3], [Customer_Addresses].[Add4], " & _
        "[Customer_Addresses].[Add5], [Customer_Addresses].[Postcode], [Customer_Addresses].[Country], [Customer_Addresses].[Telephone], [Customer_Addresses].[Fax], " & _
        "[Customer_Addresses].[Email], [Customer_Addresses].[Mobile_Phone], [Customers].[Customer_Category], [Customers].[Average_Payment_Terms], " & _
        "[Customers].[Notes], [Customers].[salesRep], [Customers].[hoEmail], [Customers].[webpage] FROM Customers " & _
        "INNER JOIN Customer_Addresses ON [Customers].[Customer_Code] =[Customer_Addresses].[Cust_Code]"

    If rbtnAF.Checked = True Then
        sql = "SELECT " & strFields & " WHERE [Customer_Addresses].[Cust_Code] BETWEEN " & _
        "'A*' AND 'F*' ORDER BY [Customer_Addresses].[Cust_Code]"

        Dim da As New OleDbDataAdapter(sql, con)

        Dim ds As New DataSet
        Dim dt As New System.Data.DataTable

        da.Fill(ds)
        dt = ds.Tables(0).Copy()

        ugExport.DataSource = Nothing
        ugExport.DataSource = dt

我认为这是正常的，我能够将正确的范围加载到网格中并按我的意愿导出它们。 但是，用户已回复我并说它没有加载所有客户。

我认为这有点奇怪，所以我加载了他们的数据库并为自己测试了它。在数据库中，有4个客户符合A-F的范围，如图所示。

但是，当我在导出列表中查看客户范围A-F时，只显示了2个客户。

还值得注意的是，在“客户列表”屏幕中有一个TextBox允许用户按客户代码进行搜索 - 当我输入一个F时，所有4个客户都显示为预期

在地球上发生什么只显示出口清单中的2个结果，尽管有4个符合标准的记录？

Answer 1

检查语法之间你会发现它将*视为文字字符，请参阅此处https://support.office.com/en-us/article/Between-And-Operator-a435878d-63f7-4825-8c31-999432ae8223

您可以使用

Like "[A-F]*"

相反。