restaurant_growth.sql

Author: stackcats

database/medium/restaurant_growth.sql

@@ -0,0 +1,12 @@
+-- Write your PostgreSQL query statement below
+SELECT visited_on,
+       SUM(amount) OVER (ROWS BETWEEN 6 PRECEDING AND CURRENT ROW)           amount,
+       ROUND(AVG(amount) OVER (ROWS BETWEEN 6 PRECEDING AND CURRENT ROW), 2) average_amount
+FROM (
+         SELECT visited_on,
+                SUM(amount) amount
+         FROM customer
+         GROUP BY visited_on
+         ORDER BY visited_on)
+OFFSET 6
+