Question: Hi there!  Can you show me a list of all customer IDs for customers not located in the state of California?
SQL: SELECT customer_id FROM customers EXCEPT SELECT t1.customer_id FROM customers AS t1 JOIN customer_addresses AS t2 ON t1.customer_id   =   t2.customer_id JOIN addresses AS t3 ON t2.address_id   =   t3.address_id WHERE t3.state_province_county   =   'California'