What is the minimum age of engineers?
select min(age) from person where job = 'engineer'
List all information for people older than this.
select * from person where age > (select min(age) from person where job = 'engineer')
Just show their name.
select name from person where age > (select min(age) from person where job = 'engineer')
Sort this group in order of ascending age.
select name from person where age > (select min(age) from person where job = 'engineer') order by age