What is the gold when silver is 1, rank is larger than 3, total is smaller than 2, bronze is smaller than 0?
CREATE TABLE "performances_by_nation" (
  "rank" real,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT SUM("gold") FROM "performances_by_nation" WHERE "silver"=1 AND "rank">3 AND "total"<2 AND "bronze"<0;