What is the sum of all ratings at a weekly rank of 10 and a share less than 11?
CREATE TABLE "ratings" (
  "air_date" text,
  "timeslot_est" text,
  "season" text,
  "rating" real,
  "share" real,
  "18_49_rating_share" text,
  "viewers_m" real,
  "weekly_rank_num" text
);
SELECT SUM("rating") FROM "ratings" WHERE "weekly_rank_num"='10' AND "share"<11;