Economie unitară

Analiza datelor de business în SQL

Michel Semaan

Data Scientist

Economie unitară

Economie unitară: Măsoară performanța per unitate, nu performanța globală
Exemplu: Venitul mediu per utilizator (ARPU)
- Formulă: $\frac{Revenue}{Count\:of\:users}$
- Utilizare: Măsoară succesul unei companii în scalarea modelului de afaceri

ARPU - interogare (I)

WITH kpis AS (
  SELECT
    SUM(meal_price * order_quantity) AS revenue,
    COUNT(DISTINCT user_id) AS users
  FROM meals
  JOIN orders ON meals.meal_id = orders.meal_id)

SELECT
  ROUND(
    revenue :: NUMERIC / GREATEST(users, 1),
  2) AS arpu
FROM kpis;

ARPU - interogare (I) pe lună

WITH kpis AS (
  SELECT
    DATE_TRUNC('month', order_date) AS delivr_month,
    SUM(meal_price * order_quantity) AS revenue,
    COUNT(DISTINCT user_id) AS users
  FROM meals
  JOIN orders ON m.meal_id = o.meal_id
  GROUP BY delivr_month)


SELECT
  delivr_month,
  ROUND(
    revenue :: NUMERIC / GREATEST(users, 1),
  2) AS arpu
FROM kpis
ORDER BY delivr_month ASC;

ARPU - interogare (II)

WITH user_revenues AS (
  SELECT
    user_id,
    SUM(meal_price * order_quantity) AS revenue
  FROM meals
  JOIN orders ON meals.meal_id = orders.meal_id
  GROUP BY user_id)

SELECT
  ROUND(AVG(revenue) :: NUMERIC, 2) AS arpu
FROM user_revenues;

Compararea celor două metode

Prima metodă

revenue    users
---------  -----
260226.75  1304

A doua metodă

user_id  revenue
-------  -------
0        262.75
1        160.5
2        255.25

ARPU - rezultat

arpu
------
199.56

Economie unitară

Analiza datelor de business în SQL