SELECT CountryCode ,  max(Percentage) FROM countrylanguage WHERE LANGUAGE  =  "Spanish" GROUP BY CountryCode
What are the codes of countries where Spanish is spoken by the largest percentage of people?
SELECT CountryCode , max ( Percentage ) FROM countrylanguage WHERE LANGUAGE = `` Spanish '' GROUP BY CountryCode
select countrycode , max ( percentage ) from countrylanguage where language = value group by countrycode
What are the codes of countries where Spanish is spoken by the largest percentage of people ?