mock sql2

1.sql

@@ -0,0 +1,8 @@
+select customer_id
+from Customer
+group by customer_id
+having count(distinct product_key) =
+(
+    select count(product_key)
+    from product
+)

2.sql

@@ -0,0 +1,9 @@
+# Write your MySQL query statement below
+with cte as (
+    select distinct product_id as p, min(year) as first_year
+    from sales
+    group by product_id
+)
+select product_id, first_year, quantity,price from sales
+join cte
+on product_id= p and year = first_year