CREATE TABLE "u_s_nielsen_ratings" (
  "episode" text,
  "air_date" text,
  "timeslot" text,
  "rating" real,
  "share" real,
  "18_49" text,
  "viewers" text,
  "weekly_rank" text
);

Question: What is the total ratings on share less than 4?
SQL: SELECT COUNT("rating") FROM "u_s_nielsen_ratings" WHERE "share"<4;