A. SELECT customer_id, customer_name   FROM customers   WHERE postal_code CONTAINS NULL;
B. SELECT customer_id, customer_name   FROM customers   WHERE postal_code = '________';
C. SELECT customer_id, customer_name   FROM customers   WHERE postal_code IS NULL;
D. SELECT customer_id, customer_name   FROM customers   WHERE postal code IS NVL;
E. SELECT customer_id, customer_name   FROM customers   WHERE postal_code = NULL;

A. Create a table view.
B. Create a view in any schema.
C. Create a view in your schema.
D. Create a sequence view in any schema.
E. Create a view that is accessible by everyone.
F. Create a view only of it is based on tables that you created.