List down the brand names of root beer that gained a 5-star rating from a customer's review in 2013. Calculate the unit profit available to wholesalers for each brand.
5-star rating refers to StarRating = 5; in 2013 refers to ReviewDate LIKE '2013%'; unit profit available to wholesalers = SUBTRACT(CurrentRetailPrice, WholesaleCost);
SELECT T1.BrandName, T1.CurrentRetailPrice - T1.WholesaleCost AS result FROM rootbeerbrand AS T1 INNER JOIN rootbeerreview AS T2 ON T1.BrandID = T2.BrandID WHERE T2.StarRating = 5 AND T2.ReviewDate BETWEEN '2013-01-01' AND '2013-12-31'