Show the product type codes that have at least two products.
SELECT Product_Type_Code FROM Products GROUP BY Product_Type_Code HAVING COUNT(*)  >=  2
SELECT Product_Type_Code FROM Products GROUP BY Product_Type_Code HAVING COUNT(*)  >=  2
[{'Product_Type_Code': 'Books'}, {'Product_Type_Code': 'Clothes'}, {'Product_Type_Code': 'Electronics'}, {'Product_Type_Code': 'Food'}]