使用表适配器生成代码，使总和功能

Question

实际上我是VB.net的新手，我想生成一个代码从数据库中选择2列，其中有8列，

我想为Department获得一列，第二列为将停机时间的总和添加到另一列中，例如按总和分组，我应用了我在表适配器查询构建器中所做的查询，效果很好，

SELECT Cast_number, SUM(Downtime) AS Total_downtime
FROM Utilization
GROUP BY Cast_number

但是当我用该代码对按钮进行编程时，它没有显示求和列

Public Class Form1
    Private Sub UtilizationBindingNavigatorSaveItem_Click(sender As Object, e As EventArgs) Handles UtilizationBindingNavigatorSaveItem.Click
        Me.Validate()
        Me.UtilizationBindingSource.EndEdit()
        Me.TableAdapterManager.UpdateAll(Me.WINCC_DATADataSet)
    End Sub
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        'TODO: This line of code loads data into the 'WINCC_DATADataSet.Utilization' table. You can move, or remove it, as needed.
        Me.UtilizationTableAdapter.Fill(Me.WINCC_DATADataSet.Utilization)
    End Sub
> *Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
>     Me.UtilizationTableAdapter.Group(Me.WINCC_DATADataSet.Utilization)*
    End Sub
End Class