CREATE TABLE "by_country_tally" (
  "rank" real,
  "country" text,
  "miss_united_continent" real,
  "virreina" real,
  "1st_ru" real,
  "2nd_ru" real,
  "3rd_ru" real,
  "4th_ru" real,
  "semifinalists" real,
  "total" real
);

Question: How many 3rd ru does Costa Rica have? 
SQL: SELECT MAX("3rd_ru") FROM "by_country_tally" WHERE "country"='Costa Rica';

Question: How many 3rd ru does Canada have? 
SQL: SELECT COUNT("3rd_ru") FROM "by_country_tally" WHERE "country"='Canada';

Question: What is the least number of miss united continents? 
SQL: SELECT MIN("miss_united_continent") FROM "by_country_tally";