How many ranks have a Code (IATA/ICAO) of ord/kord?
CREATE TABLE "2012_preliminary_statistics" (
  "rank" real,
  "airport" text,
  "code_iata_icao" text,
  "total_cargo_metric_tonnes" real,
  "pct_change" text
);
SELECT COUNT("rank") FROM "2012_preliminary_statistics" WHERE "code_iata_icao"='ord/kord';