CREATE TABLE table_63852 ("Airline" CLOB, "IATA" CLOB, "ICAO" CLOB, "Callsign" CLOB, "Commenced operations" FLOAT)

Which IATA has a ICAO of slk?
SELECT "IATA" FROM table_63852 WHERE "ICAO" = 'slk'
SELECT "IATA" FROM "table_63852" WHERE "ICAO" = 'slk'