CREATE TABLE table_204_139 (id NUMBER, "community" CLOB, "airport name" CLOB, "type" CLOB, "coordinates" CLOB)

which community has the most airports
SELECT "community" FROM table_204_139 GROUP BY "community" ORDER BY COUNT("airport name") DESC LIMIT 1
SELECT "community" FROM "table_204_139" GROUP BY "community" ORDER BY COUNT("airport name") DESC FETCH FIRST 1 ROWS ONLY