CREATE TABLE table_1293 ("Airline" CLOB, "ICAO" CLOB, "IATA" CLOB, "Callsign" CLOB, "Commenced operations" FLOAT, "Fleet size" FLOAT, "Headquarters" CLOB)

When did the oldest airline start operations?
SELECT MIN("Commenced operations") FROM table_1293
SELECT MIN("Commenced operations") FROM "table_1293"