deleting row from gridview

Question

I have 2 tables MachineGroups and Machines. MachineGroups has columns:

MachinegroupID
MachineGroupName
MachineGroupDesc

And Machines has column

Answer 1

Not tested, but the direction should be right:

<asp:SqlDataSource ID="SqlDataSource1" runat="server"
    ConnectionString="<%$ ConnectionStrings:SumooHAgentDBConnectionString %>" 
    SelectCommand="SELECT MachineGroups.MachineGroupID, MachineGroups.MachineGroupName, MachineGroups.MachineGroupDesc, MachineGroups.TimeAdded, MachineGroups.CanBeDeleted, COUNT(Machines.MachineName) AS 'No. of PCs' FROM MachineGroups FULL OUTER JOIN Machines ON Machines.MachineGroupID = MachineGroups.MachineGroupID GROUP BY MachineGroups.MachineGroupID, MachineGroups.MachineGroupName, MachineGroups.MachineGroupDesc, MachineGroups.TimeAdded, MachineGroups.CanBeDeleted" 
    DeleteCommand="DELETE FROM MachineGroups WHERE MachineGroupID = @MachineGroupID">
    <DeleteParameters>
        <asp:Parameter Name="MachineGroupID" />
    </DeleteParameters>
</asp:SqlDataSource>