Which Copa del Rey has a La Liga smaller than 0?
CREATE TABLE "goal_scorers" (
  "name" text,
  "la_liga" real,
  "copa_del_rey" real,
  "uefa_champions_league" real,
  "fifa_club_world_championship" real,
  "total" real
);
SELECT SUM("copa_del_rey") FROM "goal_scorers" WHERE "la_liga"<0;