Done Mock SQL 2

MockSQL2.sql

@@ -0,0 +1,14 @@
+
+# 1045 Customers Who Bought All Products
+
+with cte as(
+select c.customer_id, count(distinct c.product_key) as 'key_count' from Customer c inner join Product p on c.product_key =p.product_key group by c.customer_id
+)
+
+select distinct customer_id from cte where key_count =(select count(product_key) from product);
+
+1070. Product Sales Analysis III
+
+# Write your MySQL query statement below
+select product_id, year as 'first_year', quantity, price from Sales where (product_id, year) 
+IN (select product_id, MIN(year) from Sales group by product_id);