CREATE TABLE endowment (school_name VARCHAR, school_id VARCHAR)
CREATE TABLE school (school_name VARCHAR, school_id VARCHAR)

List the names of the schools without any endowment.
SELECT school_name FROM school WHERE NOT school_id IN (SELECT school_id FROM endowment)
SELECT "school_name" FROM "school" WHERE NOT "school_id" IN (SELECT "school_id" FROM "endowment")