CREATE TABLE "international_services" (
  "city" text,
  "country" text,
  "iata" text,
  "icao" text,
  "airport" text
);

Question: What airport has an IATA of ARN?
SQL: SELECT "airport" FROM "international_services" WHERE "iata"='arn';

Question: What country has an ICAO of ENZV?
SQL: SELECT "country" FROM "international_services" WHERE "icao"='enzv';

Question: What airport has an ICAP of BGBW?
SQL: SELECT "airport" FROM "international_services" WHERE "icao"='bgbw';

Question: What airport has an ICAO of Birk?
SQL: SELECT "airport" FROM "international_services" WHERE "icao"='birk';

Question: What is the ICAO for Denmark, and the IATA is bll?
SQL: SELECT "icao" FROM "international_services" WHERE "country"='denmark' AND "iata"='bll';