by siwili » Thu May 31, 2012 4:26 pm
Commercial law is the law governing commercial transactions. It extends a bit beyond that (these are not hard-and-fast definitions or fields by any means) and could conceivably include parts of many other fields that are indirectly related to the buying and selling of goods.
Corporate law is the body of law dealing with corporations. It includes bits and pieces from dozens of different fields, and would include some aspects of commercial law.