How many totals have a rank greater than 4, czech Republic as the nation, and a bronze greater than 0?
CREATE TABLE "medals_table" (
  "rank" real,
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT SUM("total") FROM "medals_table" WHERE "rank">4 AND "nation"='czech republic' AND "bronze">0;