Remove unnecessary join and Select only necessary columns in place of…

… Select *

jaffle_shop/models/final/finance/fnl_returned_order_value.sql

@@ -1,18 +1,13 @@
 WITH returned_orders AS (
-  SELECT * 
+  SELECT 
+    orders.customer_id AS customer_id
+    orders.amount as total_amount
   FROM {{ ref('wh_orders') }}
-  WHERE status = 'returned'
-)
-
-customers AS (
-  SELECT * 
-  FROM {{ref('stg_customers') }}
+  WHERE orders.status = 'returned'
 )
 
 SELECT 
   customer_id
   , SUM(COALESCE(total_amount, 0) AS total_value
 FROM returned_orders
-LEFT JOIN customers
-  ON returned_orders.customer_id = customers.customer_id
 GROUP BY customer_id