Context: CREATE TABLE CAR_MAKERS (Country VARCHAR); CREATE TABLE COUNTRIES (CountryName VARCHAR, CountryId VARCHAR)
Question: What are the countries having at least one car maker? List name and id.
Answer: SELECT T1.CountryName, T1.CountryId FROM COUNTRIES AS T1 JOIN CAR_MAKERS AS T2 ON T1.CountryId = T2.Country GROUP BY T1.CountryId HAVING COUNT(*) >= 1