private void allOrdersByClient_Click(object sender, EventArgs e)
        {
            var query             = "Select * from Клиент as c join Заказ as z on c.[Код клиента] = z.[Код клиента] where c.[Код клиента] =";
            var title             = "Справка о всех заказах заданного клиента";
            var zakazWithClientId = new QueryWithCondition(query, title);

            zakazWithClientId.Show();
            this.Close();
        }
        private void zakazWithZakazId_Click(object sender, EventArgs e)
        {
            var query            = "select * from Заказ where [Код заказа] =";
            var title            = "Справка по заданному заказу";
            var zakazWithZakazId = new QueryWithCondition(query, title);

            zakazWithZakazId.Show();
            this.Close();
        }