SELECT product_id, (expiry_date – delivery_date) * 2 FROM products;
SELECT product_id, unit_price | | 5 “Discount”, unit_price + surcharge – discount FROM products;
SELECT product_id, unit_price, 5 “Discount”, unit_price + surcharge – discount FROM products;
SELECT product_id, unit_price, unit_price + surcharge FROM products;
SELECT product_id, (unit_price * 0.15 \/ (4.75 + 552.25)) FROM products\
SELECT product_id, expiry_date * 2 FROM products;