Table: tv_ratings_17
Columns: air_date
timeslot
rating
share
18_49
viewers
weekly_rank

Question: What is the average share at 8:00 p.m., and an 18-49 of 1.3/4 with an air date of April 4, 2008?
SQL: SELECT AVG("share") FROM tv_ratings_17 WHERE "timeslot" = '8:00 p.m.' AND "18_49" = '1.3/4' AND "air_date" = 'april 4, 2008'

Question: What is the lowest share with an air date of March 21, 2008 and had viewers larger than 5.15?
SQL: SELECT MIN("share") FROM tv_ratings_17 WHERE "air_date" = 'march 21, 2008' AND "viewers" > 5.15