CREATE TABLE host (host_id NUMBER, name CLOB, nationality CLOB, age CLOB)
CREATE TABLE party (party_id NUMBER, party_theme CLOB, location CLOB, first_year CLOB, last_year CLOB, number_of_hosts NUMBER)
CREATE TABLE party_host (party_id NUMBER, host_id NUMBER, is_main_in_charge others)

List the names of hosts who did not serve as a host of any party in our record.
SELECT name FROM host WHERE NOT host_id IN (SELECT host_id FROM party_host)
SELECT "name" FROM "host" WHERE NOT "host_id" IN (SELECT "host_id" FROM "party_host")