What are the stores with marketing region code "CA"?
select * from stores where marketing_region_code = "CA"
What are their addresses?
select line_1, line_2 from stores as t1 join addresses as t2 on t1.address_id = t2.address_id where marketing_region_code = "CA"
What are the states or counties those addresses belong to?
select t1.state_county from addresses as t1 join stores as t2 on t1.address_id = t2.address_id where t2.marketing_region_code = "CA"