CREATE TABLE table_43777 ("City" TEXT, "Country" TEXT, "IATA" TEXT, "ICAO" TEXT, "Airport" TEXT)

What is ICAO, when IATA is 'HKG'?
SELECT "ICAO" FROM table_43777 WHERE "IATA" = 'hkg'
SELECT "ICAO" FROM "table_43777" WHERE "IATA" = 'hkg'