CREATE TABLE phone (Name VARCHAR2, Phone_id VARCHAR2, Phone_ID VARCHAR2)
CREATE TABLE phone_market (Name VARCHAR2, Phone_id VARCHAR2, Phone_ID VARCHAR2)

List the names of phones that are not on any market.
SELECT Name FROM phone WHERE NOT Phone_id IN (SELECT Phone_id FROM phone_market)
SELECT "Name" FROM "phone" WHERE NOT "Phone_id" IN (SELECT "Phone_id" FROM "phone_market")