List the states where each secretary was born.
select distinct born_state from head
List the information of the secretary of 'Treasury' department and the secretary of 'Homeland Security' department.
select t3.name, t3.born_state from department as t1 join management as t2 on t1.department_id = t2.department_id join head as t3 on t2.head_id = t3.head_id where t1.name = 'Treasury' or t1.name = 'Homeland Security'
List the states where both the secretary of 'Treasury' department and the secretary of 'Homeland Security' were born.
select t3.born_state from department as t1 join management as t2 on t1.department_id = t2.department_id join head as t3 on t2.head_id = t3.head_id where t1.name = 'Treasury' intersect select t3.born_state from department as t1 join management as t2 on t1.department_id = t2.department_id join head as t3 on t2.head_id = t3.head_id where t1.name = 'Homeland Security'