-- Database schema
| City : ID [ INTEGER ] primary_key , Name [ TEXT ] , CountryCode [ TEXT ] City.CountryCode = Country.Code , District [ TEXT ] , Population [ INTEGER ] | Country : Code [ TEXT ] primary_key , Name [ TEXT ] , Continent [ TEXT ] , Region [ TEXT ] , SurfaceArea [ REAL ] , IndepYear [ INTEGER ] , Population [ INTEGER ] , LifeExpectancy [ REAL ] , GNP [ REAL ] , GNPOld [ REAL ] , LocalName [ TEXT ] , GovernmentForm [ TEXT ] , HeadOfState [ TEXT ] , Capital [ INTEGER ] , Code2 [ TEXT ] | CountryLanguage : CountryCode [ TEXT ] CountryLanguage.CountryCode = Country.Code , Language [ TEXT ] , IsOfficial [ TEXT ] , Percentage [ REAL ] |
-- -- List the languages used in the USA.

SELECT Language FROM CountryLanguage WHERE CountryCode = 'USA';