name: new_customers
display_name: New Customers
category: sales
type: count
unit: customers
grain: monthly
table: orders
expression: "COUNT(DISTINCT customer_id)"
time_column: order_date
description: "New Customers — the count of customers placing their first-ever order in a given month."
dimensions:
  - channel
  - region
synonyms:
  - new_logos
  - first_time_buyers
  - customer_acquisition
notes:
  - "A customer is 'new' only if they have no prior orders in any historical period"
  - "Exclude internal test accounts and employees from the count"
  - "Use acquisition channel (UTM/referral) from first order for attribution"
sql: |
  WITH first_orders AS (
      SELECT
          customer_id,
          MIN(order_date) AS first_order_date
      FROM orders
      WHERE status != 'cancelled'
      GROUP BY customer_id
  )
  SELECT
      DATE_TRUNC('month', first_order_date) AS month,
      COUNT(DISTINCT customer_id) AS new_customers
  FROM first_orders
  GROUP BY 1
  ORDER BY 1