What is the largest goal ratio with Goals smaller than 0?
CREATE TABLE "top_appearances_in_uefa_club_competition" (
  "rank" real,
  "player" text,
  "games" real,
  "goals" real,
  "goal_ratio" real,
  "debut_in_europe" real
);
SELECT MAX("goal_ratio") FROM "top_appearances_in_uefa_club_competition" WHERE "goals"<0;