Show the Min MPG and Max MPG for each car model. Display the Car Maker name and the Model as one field, Chrysler Dodge. Both fields should start with a capital letter, concatenate them together with a hypen. Order the results by the Car Maker name.

SELECT initcap(c.maker) ||'-'|| initcap(m.model) as "Maker and Model", MAX(MPG), MIN(MPG) from CAR_DETAILS D, CAR_MAKERS C, MODEL_DETAILS M where D.ID = C.ID AND M.MAKER = C.ID GROUP BY "Maker and Model" order by c.maker

can someone please fix my code!!