diff --git a/Problem1.sql b/Problem1.sql
new file mode 100644
index 0000000..56856c8
--- /dev/null
+++ b/Problem1.sql
@@ -0,0 +1,3 @@
+WITH CTE AS (SELECT *, DENSE_RANK()
+OVER(PARTITION BY product_id ORDER BY year) as 'first_year' from sales )
+Select product_id, year as 'first_year', quantity, price from CTE where first_year = 1
\ No newline at end of file
diff --git a/Problem2.sql b/Problem2.sql
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--- /dev/null
+++ b/Problem2.sql
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+SELECT customer_id from customer group by customer_id
+having COUNT(Distinct product_key) = (Select COUNT(distinct product_key) from product)
\ No newline at end of file