CREATE TABLE Addresses (zip_postcode VARCHAR(255), address_id VARCHAR(255)); CREATE TABLE Staff (staff_address_id VARCHAR(255), first_name VARCHAR(255), last_name VARCHAR(255))
What is the zip code of staff with first name as Janessa and last name as Sawayn lived?
    
SQL: 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"