user: Question: what is the total rank on airdate March 30, 2011?
Columns: ['Episode Number', 'Episode Name', 'Airdate', 'Viewers (millions)', 'Rank(Timeslot)', 'Rank 18–49 (Night)']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2-01', 'All Mixed Up', 'February 9, 2011', 'N/A', 'N/A', 'N/A']
SQL:

assistant: SELECT SUM("Rank(Timeslot)") FROM "Table" WHERE "Airdate" = 'March 30, 2011';