What nation had a rank higher than 4, a total of 2 medals and more than 0 silver medals?
CREATE TABLE "medal_table" (
  "rank" real,
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT "nation" FROM "medal_table" WHERE "rank">4 AND "total"=2 AND "silver">0;