Which of the countries has the most car makers? List the country name.
create table car_makers (country varchar, PRIMARY KEY (country)); create table countries (countryname varchar, countryid varchar, PRIMARY KEY (countryname))
select t2.countryname from car_makers as t1 join countries as t2 on t1.country = t2.countryid group by t1.country order by count(*) desc limit 1