I want the ends for transfer fee of free and goals being 0 for roy carroll
CREATE TABLE "squad_information" (
  "nat" text,
  "name" text,
  "since" text,
  "goals" real,
  "ends" real,
  "transfer_fee" text
);
SELECT "ends" FROM "squad_information" WHERE "transfer_fee"='free' AND "goals"=0 AND "name"='roy carroll';