CREATE TABLE addresses (state_province_county VARCHAR, address_id VARCHAR, employee_address_id VARCHAR)
CREATE TABLE Employees (state_province_county VARCHAR, address_id VARCHAR, employee_address_id VARCHAR)

Find the states which do not have any employee in their record.
SELECT state_province_county FROM addresses WHERE NOT address_id IN (SELECT employee_address_id FROM Employees)
SELECT "state_province_county" FROM "addresses" WHERE NOT "address_id" IN (SELECT "employee_address_id" FROM "Employees")