CREATE TABLE Complaints (complaint_id NUMBER, product_id NUMBER, customer_id NUMBER, complaint_outcome_code VARCHAR2, complaint_status_code VARCHAR2, complaint_type_code VARCHAR2, date_complaint_raised DATETIME, date_complaint_closed DATETIME, staff_id NUMBER)
CREATE TABLE Customers (customer_id NUMBER, customer_type_code VARCHAR2, address_line_1 VARCHAR2, address_line_2 VARCHAR2, town_city VARCHAR2, state VARCHAR2, email_address VARCHAR2, phone_number VARCHAR2)
CREATE TABLE Staff (staff_id NUMBER, gender VARCHAR2, first_name VARCHAR2, last_name VARCHAR2, email_address VARCHAR2, phone_number VARCHAR2)
CREATE TABLE Products (product_id NUMBER, parent_product_id NUMBER, product_category_code VARCHAR2, date_product_first_available DATETIME, date_product_discontinued DATETIME, product_name VARCHAR2, product_description VARCHAR2, product_price NUMBER)

Return the average price of products that have each category code in a bar chart.
SELECT product_category_code, AVG(product_price) FROM Products GROUP BY product_category_code
SELECT "product_category_code", AVG("product_price") FROM "Products" GROUP BY "product_category_code"