Find all the policy type codes associated with the customer "Dayana Robel"
SELECT policy_type_code FROM policies AS t1 JOIN customers AS t2 ON t1.customer_id  =  t2.customer_id WHERE t2.customer_details  =  "Dayana Robel"
policy type codes associated with the customer 'Dayana Robel' refers to policy_type_code; joining tables policies and customers on customer_id; filtering by customer_details = 'Dayana Robel';