How many values for silver occur when gold is less than 1, the rank is 13, and bronze is greater than 2?
CREATE TABLE "medal_table" (
  "rank" real,
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT COUNT("silver") FROM "medal_table" WHERE "gold"<1 AND "rank"=13 AND "bronze">2;