mysql - 如何通过下拉列表从数据库中删除值？

Question

基本上，我试图向用户提供删除与员工相关的数据的功能，方法是从下拉列表中选择员工的姓名并单击“完成”，但我不断收到错误消息，例如

"Incorrect syntax near "," "

但是我已经设置了检查点，可以看到没有任何值(value)被获取，所以我想知道有人知道我哪里出了问题吗？

 Dim Con As SqlConnection
    Dim cmd As SqlCommand
    Dim recordsAffected As String
    Dim cmdstring As String = "Delete StaffID, FullName, Gender, Age, Driver, StartDate, ContactNumber, Waistcoat WHERE FullName = DropDownList1.SelectedValue"
    Con = New SqlConnection("Data Source=OISINMCGRANN-PC\SQLEXPRESS;Initial Catalog=YellowDoor;Integrated Security=True")
    cmd = New SqlCommand(cmdstring, Con)
    Con.Open()
    RecordsAffected = cmd.ExecuteNonQuery()
    Con.Close()
End Sub

我尝试过在引号中没有下拉列表:

   Dim Con As SqlConnection
        Dim cmd As SqlCommand
        Dim recordsAffected As String
        Dim cmdstring As String = "Delete StaffID, FullName, Gender, Age, Driver, StartDate, ContactNumber, Waistcoat WHERE FullName =" + DropDownList1.SelectedValue
        Con = New SqlConnection("Data Source=OISINMCGRANN-PC\SQLEXPRESS;Initial Catalog=YellowDoor;Integrated Security=True")
        cmd = New SqlCommand(cmdstring, Con)
        Con.Open()
        RecordsAffected = cmd.ExecuteNonQuery()
        Con.Close()
    End Sub

Answer 1

如果您使用 MySql，则查询应该是

DELETE FROM table_name
WHERE some_column = some_value 

我在您的查询中没有看到任何表名称

Delete [FROM TABLE?] WHERE FullName =" + DropDownList1.SelectedValue