ฮิสโตแกรมของรายรับ

WITH user_revenues AS (
  SELECT
    -- Select the user ID and revenue
    ___,
    ___ AS revenue
  FROM meals AS m
  JOIN orders AS o ON m.meal_id = o.meal_id
  GROUP BY user_id)

SELECT
  -- Return the frequency table of revenues by user
  ___ AS revenue_100,
  ___ AS users
FROM user_revenues
GROUP BY revenue_100
ORDER BY revenue_100 ASC;