Compute total amount spent by each customer [1728569321028]

jaffle_shop/models/customer_total_amount_spent.sql

@@ -0,0 +1,30 @@
+{{ config(materialized='table') }}
+
+with orders as (
+    select * from {{ ref('stg_orders') }}
+),
+
+payments as (
+    select * from {{ ref('stg_payments') }}
+),
+
+customer_orders as (
+    select
+        orders.customer_id,
+        sum(payments.amount) as total_amount_spent
+    from orders
+    left join payments on orders.order_id = payments.order_id
+    group by 1
+),
+
+final as (
+    select
+        customers.customer_id,
+        customers.first_name,
+        customers.last_name,
+        coalesce(customer_orders.total_amount_spent, 0) as total_amount_spent
+    from {{ ref('stg_customers') }} as customers
+    left join customer_orders using (customer_id)
+)
+
+select * from final