Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE customers (customer_id VARCHAR, customer_details VARCHAR)
TABLE: CREATE TABLE policies (customer_id VARCHAR)

### Question ###
Find all the policy type codes associated with the customer "Dayana Robel"

### Accurate SQL ###

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"