การเปลี่ยนตัวพิมพ์ของข้อมูลสตริง

SELECT 
  -- Concatenate the category name to coverted to uppercase
  -- to the film title converted to title case
  ___(___)  || ': ' || ___(___) AS film_category, 
  -- Convert the description column to lowercase
  ___(___) AS description
FROM 
  film AS f 
  INNER JOIN film_category AS fc 
  	ON f.film_id = fc.film_id 
  INNER JOIN category AS c 
  	ON fc.category_id = c.category_id;