INSERT INTO CUSTOMERS ( Company, Name, Phone_1, Address_1, City, State, Zipcode, Marketing, Phone, Code )
SELECT Company, Name, Phone_1, Address_1, City, State, Zipcode, Marketing, Phone, Code FROM IMPORT
ON DUPLICATE KEY UPDATE Company=VALUES(Company), Name=VALUES(Name), Address_1=VALUES(Address_1),
City=VALUES(City), State=VALUES(State), Zipcode=VALUES(Zipcode), Marketing=VALUES(Marketing),Phone=VALUES(Phone), Code=VALUES(Code);