What is the lowest number of total goals for a player with 6 league goals?
CREATE TABLE "player_statistics" (
  "position" text,
  "nationality" text,
  "name" text,
  "league_apps" real,
  "league_goals" real,
  "fa_cup_apps" real,
  "fa_cup_goals" real,
  "total_apps" real,
  "total_goals" real
);
SELECT MIN("total_goals") FROM "player_statistics" WHERE "league_goals"=6;