CREATE TABLE personfriend (name CLOB, friend CLOB, year NUMBER)
CREATE TABLE person (name CLOB, age NUMBER, city CLOB, gender CLOB, job CLOB)

What is the total number of people who have no friends living in Austin?
SELECT COUNT(DISTINCT name) FROM personfriend WHERE NOT friend IN (SELECT name FROM person WHERE city = 'Austin')
SELECT COUNT(DISTINCT "name") FROM "personfriend" WHERE NOT "friend" IN (SELECT "name" FROM "person" WHERE "city" = 'Austin')