เมื่อทำการ insert ข้อมูลจากตารางเก่าไปตารางใหม่แล้วต้องการลบข้อมูลจากตารางเก่าไปด้วยต้องใช้คำสั่งอะไรครับ

 protected void Button1_Click(object sender, EventArgs e)
        {
           foreach (GridViewRow row in GridView1.Rows)
            {
                var chk = row.FindControl("chkDelete") as CheckBox;

                if (chk.Checked)
                {
                    var lblID = row.FindControl("lblID") as Label;
                    var lblMC = row.FindControl("lblMC") as Label;
                    var lblEmployeeID = row.FindControl("lblEmployeeID") as Label;
                    var lblName = row.FindControl("lblName") as Label;
                    var lblLastName = row.FindControl("lblLastName") as Label;
                    var lblDep = row.FindControl("lblDep") as Label;
                    var lblFaction = row.FindControl("lblFaction") as Label;
                    var lblShife = row.FindControl("lblShife") as Label;
                    var lblDay = row.FindControl("lblDay") as Label;
                    var lblTimeStart = row.FindControl("lblTimeStart") as Label;
                    var lblTimeEnd = row.FindControl("lblTimeEnd") as Label;
                    var lblCar = row.FindControl("lblCar") as Label;
                    var lblFood = row.FindControl("lblFood") as Label;
                    var lblRemark = row.FindControl("lblRemark") as Label;
                    // Response.Write(lblID.Text + "<br>");

                    SqlCommand comm = new SqlCommand();
                    comm.CommandText = "insert into ApproveGA_HR (id,MC,EmployeeID,Name,LastName,Dep,Faction,Shife,Day,TimeStart,TimeEnd,Car,Food,Remark) Values (@id,@MC,@EmployeeID,@Name,@LastName,@Dep,@Faction,@Shife,@Day,@TimeStart,@TimeEnd,@Car,@Food,@Remark)";
                    //comm.CommandText = "delete from Detail where id=@id";
                    comm.Parameters.AddWithValue("@id", int.Parse(lblID.Text));
                    comm.Parameters.AddWithValue("@MC", Convert.ToString(lblMC.Text));
                    comm.Parameters.AddWithValue("@EmployeeID", int.Parse(lblEmployeeID.Text));
                    comm.Parameters.AddWithValue("@Name", Convert.ToString(lblName.Text));
                    comm.Parameters.AddWithValue("@LastName", Convert.ToString(lblLastName.Text));
                    comm.Parameters.AddWithValue("@Dep", Convert.ToString(lblDep.Text));
                    comm.Parameters.AddWithValue("@Faction", Convert.ToString(lblFaction.Text));
                    comm.Parameters.AddWithValue("@Shife", Convert.ToString(lblShife.Text));
                    comm.Parameters.AddWithValue("@Day", Convert.ToString(lblDay.Text));
                    comm.Parameters.AddWithValue("@TimeStart", Convert.ToString(lblTimeStart.Text));
                    comm.Parameters.AddWithValue("@TimeEnd", Convert.ToString(lblTimeEnd.Text));
                    comm.Parameters.AddWithValue("@Car", Convert.ToString(lblCar.Text));
                    comm.Parameters.AddWithValue("@Food", Convert.ToString(lblFood.Text));
                    comm.Parameters.AddWithValue("@Remark", Convert.ToString(lblRemark.Text));

                    comm.Connection = con1;

                    //comm.Parameters.AddWithValue("@id", int.Parse(lblID.Text));
                  
                    con1.Open();
                    
                    comm.ExecuteNonQuery();
                    con1.Close();

                    //LoadGridView1();
                    }
              }
        }