diff --git a/Customers_who_Bought_All_Products.txt b/Customers_who_Bought_All_Products.txt
new file mode 100644
index 0000000..2cc9f34
--- /dev/null
+++ b/Customers_who_Bought_All_Products.txt
@@ -0,0 +1,2 @@
+select customer_id from customer group by customer_id
+having count(distinct product_key) = (select count(*) from product)
diff --git a/Product_Sales_Analysis_III.txt b/Product_Sales_Analysis_III.txt
new file mode 100644
index 0000000..0ee848c
--- /dev/null
+++ b/Product_Sales_Analysis_III.txt
@@ -0,0 +1,2 @@
+with cte as (select product_id,year,quantity,price, rank() over(partition by product_id order by year) as rnk from sales)
+select product_id, year as first_year, quantity, price from cte where rnk = 1;