MAU monitor (III)

WITH mau AS (
  SELECT
    DATE_TRUNC('month', order_date) :: DATE AS delivr_month,
    COUNT(DISTINCT user_id) AS mau
  FROM orders
  GROUP BY delivr_month),

  mau_with_lag AS (
  SELECT
    delivr_month,
    mau,
    GREATEST(
      LAG(mau) OVER (ORDER BY delivr_month ASC),
    1) AS last_mau
  FROM mau)

SELECT
  -- Calculate the MoM MAU growth rates
  ___,
  ROUND(
    ___,
  2) AS growth
FROM mau_with_lag
-- Order by month in ascending order
ORDER BY ___;