CREATE TABLE debate (debate_id NUMBER, date CLOB, venue CLOB, num_of_audience NUMBER)
CREATE TABLE debate_people (debate_id NUMBER, affirmative NUMBER, negative NUMBER, if_affirmative_win others)
CREATE TABLE people (people_id NUMBER, district CLOB, name CLOB, party CLOB, age NUMBER)

How many debates are there?
SELECT COUNT(*) FROM debate
SELECT COUNT(*) FROM "debate"