What's the Total for a Mexico City game with a Gold of less than 4 and a Bronze of less than 2?
CREATE TABLE "summer" (
  "year" text,
  "edition" text,
  "host_city" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT COUNT("total") FROM "summer" WHERE "host_city"='mexico city' AND "gold"<4 AND "bronze"<2;