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

Find the number of people whose age is greater than all engineers.
SELECT COUNT(*) FROM person WHERE age > (SELECT MAX(age) FROM person WHERE job = 'engineer')
SELECT COUNT(*) FROM "person" WHERE "age" > (SELECT MAX("age") FROM "person" WHERE "job" = 'engineer')