Yes
select count ( * ) from addresses as t1 join staff as t2 on t1.address_id = t2.staff_address_id where t2.first_name = "Janessa"
Yes
select t1.zip_postcode from addresses as t1 join staff as t2 on t1.address_id = t2.staff_address_id where t2.first_name = "Janessa"
Yes
select t1.zip_postcode from addresses as t1 join staff as t2 on t1.address_id = t2.staff_address_id where t2.first_name = "Camylle"
Yes
select t1.zip_postcode from addresses as t1 join staff as t2 on t1.address_id = t2.staff_address_id where t2.first_name = "Kaitlin"
Yes
select last_name from staff where first_name = 'Kaitlin'
Yes
select last_name from staff where first_name = 'Janessa'
Yes
select t1.zip_postcode from addresses as t1 join staff as t2 on t1.address_id = t2.staff_address_id where t2.first_name = "Janessa" and t2.last_name = "Sawayn"