Question: What are the name of the countries where there is not a single car maker?
Schema: create table countries (countryname varchar, countryid varchar, PRIMARY KEY (countryname)); create table countries (countryname varchar, PRIMARY KEY (countryname)); create table car_makers (country varchar, PRIMARY KEY (country))
SQL: select countryname from countries except select t1.countryname from countries as t1 join car_makers as t2 on t1.countryid = t2.country