SELECT address FROM member WHERE age  <  30 INTERSECT SELECT address FROM member WHERE age  >  40
Which address has both members younger than 30 and members older than 40?
SELECT address FROM member WHERE age < 30 INTERSECT SELECT address FROM member WHERE age > 40
select address from member where age < value intersect select address from member where age > value
Which address has both members younger than 30 and members older than 40 ?