CREATE TABLE table_31775 ("City" TEXT, "Country" TEXT, "IATA" TEXT, "ICAO" TEXT, "Airport" TEXT)

Tell me the iata for icao of tjrv
SELECT "IATA" FROM table_31775 WHERE "ICAO" = 'tjrv'
SELECT "IATA" FROM "table_31775" WHERE "ICAO" = 'tjrv'