text: INSERT INTO Product VALUES
  ('P01', 'Samsung Galaxy S20', 'Smartphone', 3299);
  
  INSERT INTO Product VALUES
  ('P02', 'Asus Notebook', 'PC', 4599);
  ---------------------------------------------------------------------------------------
  
  INSERT INTO Costumer VALUES
  ('C01', 'ALI', 71321009);
  
  INSERT INTO Costumer VALUES
  ('C02', 'ASMA', 77345823);
  ----------------------------------------------------------------------------------------------------
  INSERT INTO Orders (Costumer_id,Product_id,Quantity,Total_amount) 
  VALUES ('C01', 'P02', 2, 9468);
  
  INSERT INTO Orders VALUES
  ('C02', 'P01', '28/05/2020', 1, 3299);