Quais são os países onde o inglês ou o holandês é a língua oficial?
CREATE TABLE countrylanguage (countrycode VARCHAR, language VARCHAR); CREATE TABLE country (name VARCHAR, code VARCHAR)
SELECT t1.name FROM country AS t1 JOIN countrylanguage AS t2 ON t1.code = t2.countrycode WHERE t2.language = "english" AND isofficial = "t" UNION SELECT t1.name FROM country AS t1 JOIN countrylanguage AS t2 ON t1.code = t2.countrycode WHERE t2.language = "dutch" AND isofficial = "t"