what is the total rank on airdate march 30, 2011?
CREATE TABLE table_27987623_4 (rank_timeslot_ VARCHAR, airdate VARCHAR)
SELECT COUNT(rank_timeslot_) FROM table_27987623_4 WHERE airdate = "March 30, 2011"
### Context: CREATE TABLE table_27987623_4 (rank_timeslot_ VARCHAR, airdate VARCHAR) ### Question: what is the total rank on airdate march 30, 2011? ### Answer: SELECT COUNT(rank_timeslot_) FROM table_27987623_4 WHERE airdate = "March 30, 2011"