What was the earliest season recorded for any team
CREATE TABLE "current_clubs_2014_season" (
  "club" text,
  "position_in_2013" text,
  "first_season" real,
  "first_season_of_current_spell" real,
  "number_of_seasons_in_superettan" real,
  "number_of_seasons_in_second_tier" text
);
SELECT MIN("first_season") FROM "current_clubs_2014_season";