From 825e48d62d8ac0e2ee87196e1de84619ffdef17c Mon Sep 17 00:00:00 2001
From: Varada MV <36720961+shinevarada@users.noreply.github.com>
Date: Tue, 25 Jun 2024 17:20:48 +0000
Subject: [PATCH] Master Solution for #1251. Average Selling Price will not
 satisfy all the test cases in leetcode. Hence proposing a new solution. Can
 verify it in leetcode.

---
 Order and Deliver/# 1251. Average Selling Price.sql | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Order and Deliver/# 1251. Average Selling Price.sql b/Order and Deliver/# 1251. Average Selling Price.sql
index 5760a4e..feffb5c 100644
--- a/Order and Deliver/# 1251. Average Selling Price.sql	
+++ b/Order and Deliver/# 1251. Average Selling Price.sql	
@@ -4,7 +4,8 @@
 # For each product_id there will be no two overlapping periods. That means there will be no two intersecting periods for the same product_id.
 
 SELECT p.product_id, ROUND(SUM(u.units*p.price)/SUM(u.units),2) AS average_price
-FROM Prices p JOIN UnitsSold u USING(product_id)
-WHERE u.purchase_date BETWEEN p.start_date AND p.end_date
+FROM Prices p LEFT JOIN UnitsSold u 
+ON p.product_id = u.product_id
+AND u.purchase_date BETWEEN p.start_date AND p.end_date
 GROUP BY 1
 ;