SELECT count(*) FROM Person WHERE age  >  (SELECT max(age) FROM person WHERE job  =  'engineer')
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 = value )
Find the number of people whose age is greater than all engineers .