Insert data into table(from select) using 2 DataGridView

public void insert_sales_list()
    {
        conn.Open();
        foreach (DataGridViewRow row in dgvService.SelectedRows)
        {               
            SQLiteCommand cmd = new SQLiteCommand("insert into sales_list (sales_created_date, sales_created_name, emp_name, cust_phone, cust_name, planned_date, planned_time, service_name, discount, price, order_id) values (@ocd, @ocn, @emp, @c_phone, @c_name, @p_date, @p_time, @sn, @disc, @price, @o_id)", conn);             
            cmd.Parameters.AddWithValue("@ocd", DateTime.Now);
            cmd.Parameters.AddWithValue("@ocn", lblLoginUser.Text);
            cmd.Parameters.AddWithValue("@emp", dgvOrderList.CurrentRow.Cells[1].Value.ToString());
            cmd.Parameters.AddWithValue("@c_phone", dgvOrderList.CurrentRow.Cells[2].Value.ToString());
            cmd.Parameters.AddWithValue("@c_name", dgvOrderList.CurrentRow.Cells[3].Value.ToString());
            cmd.Parameters.AddWithValue("@p_date", dgvOrderList.CurrentRow.Cells[5].Value);
            cmd.Parameters.AddWithValue("@p_time", dgvOrderList.CurrentRow.Cells[6].Value.ToString());
            cmd.Parameters.AddWithValue("@sn", row.Cells[0].Value.ToString());
            cmd.Parameters.AddWithValue("@disc", dgvOrderList.CurrentRow.Cells[4].Value.ToString());
            cmd.Parameters.AddWithValue("@price", row.Cells[1].Value.ToString());
            cmd.Parameters.AddWithValue("@o_id", dgvOrderList.CurrentRow.Cells["order id"].Value);
            cmd.ExecuteNonQuery();
 
            string sql = "update order_list set status = 'Saved' where id = '" + dgvOrderList.CurrentRow.Cells["order id"].Value + "'";
            cmd = new SQLiteCommand(sql, conn);
            cmd.ExecuteNonQuery();
        }
        conn.Close();

public void insert_sales_materials()
    {
        conn.Open();
        foreach (DataGridViewRow row in dgvService.SelectedRows)
        {               
            string Query = "insert into sales_list_materials(order_id, material_id, norma, created_name, creation_date) " +
                "values( select '" + dgvOrderList.CurrentRow.Cells["order id"].Value + "', a.material_id, a.norma, '" + lblLoginUser.Text + "', '" + DateTime.Now + "'  from service_materials a where a.service_id = '" + row.Cells[2].Value + "')";
            SQLiteCommand cmd = new SQLiteCommand(Query, conn);
            cmd.ExecuteNonQuery();
        }
        conn.Close();
    }

public void insert_sales_materials()
        {
            conn.Open();
            foreach (DataGridViewRow row in dgvService.SelectedRows)
            {               
                string Query = "insert into sales_list_materials(order_id, material_id, norma, created_name, creation_date) " +
                    "select '" + dgvOrderList.CurrentRow.Cells["номер заказа"].Value + "', a.material_id, a.norma, '" + lblLoginUser.Text + "', '" + DateTime.Now + "'  from service_materials a where a.service_id = '" + row.Cells[2].Value + "'";
                SQLiteCommand cmd = new SQLiteCommand(Query, conn);
                cmd.ExecuteNonQuery();
            }
            conn.Close();
        }