CREATE TABLE "world_championships_total_medals" (
  "rank" text,
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);

Question: How many bronze medals did the team have with 0 total silver and less than 3 total medals?
SQL: SELECT "bronze" FROM "world_championships_total_medals" WHERE "total"<3 AND "silver">0;

Question: What is the total number of bronze medals for the team with more than 4 silver and less than 30 gold medals?
SQL: SELECT COUNT("bronze") FROM "world_championships_total_medals" WHERE "silver">4 AND "nation"='total' AND "gold"<30;