Table: tv_ratings_11
Columns: episode
air_date
timeslot_est
season
rating
share
18_49
viewers_m
rank

Question: What is the average rating of viewers 18 to 49 where the total viewer count is 3.93 million and share less than 4?
SQL: SELECT AVG("18_49") FROM tv_ratings_11 WHERE "viewers_m" = 3.93 AND "share" < 4

Question: What is the total number of ratings among the 18 to 49 group that was aired on January 7, 2009?
SQL: SELECT COUNT("18_49") FROM tv_ratings_11 WHERE "air_date" = 'january 7, 2009'

Question: What is the total number of viewers for the show that was aired on December 10, 2008 with an 18 to 49 rating less than 1.2?
SQL: SELECT COUNT("viewers_m") FROM tv_ratings_11 WHERE "air_date" = 'december 10, 2008' AND "18_49" < 1.2