What is the sum of Total for 0 gold and less than 2, silver with a rank of 6?
CREATE TABLE "medal_table" (
  "rank" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT SUM("total") FROM "medal_table" WHERE "gold"=0 AND "silver"<2 AND "rank"='6';