CREATE TABLE products (product_id NUMBER, product_type_code CLOB, product_name CLOB, product_price NUMBER)
CREATE TABLE order_items (order_item_id NUMBER, order_id NUMBER, product_id NUMBER, order_quantity CLOB)
CREATE TABLE addresses (address_id NUMBER, line_1_number_building CLOB, city CLOB, zip_postcode CLOB, state_province_county CLOB, country CLOB)
CREATE TABLE customer_address_history (customer_id NUMBER, address_id NUMBER, date_from TIME, date_to TIME)
CREATE TABLE contacts (contact_id NUMBER, customer_id NUMBER, gender CLOB, first_name CLOB, last_name CLOB, contact_phone CLOB)
CREATE TABLE customer_orders (order_id NUMBER, customer_id NUMBER, order_date TIME, order_status_code CLOB)
CREATE TABLE customers (customer_id NUMBER, payment_method_code CLOB, customer_number CLOB, customer_name CLOB, customer_address CLOB, customer_phone CLOB, customer_email CLOB)

Show all distinct cities in the address record.
SELECT DISTINCT city FROM addresses
SELECT DISTINCT "city" FROM "addresses"