Done Mock_SQL2

Mock_SQL2.sql

@@ -0,0 +1,21 @@
+# Solution
+with cte1 as
+(
+    select u.user_id, u.favorite_brand, i.item_id, i.item_brand, o.order_date, 
+    rank() over(partition by u.user_id order by o.order_date) as ranks
+    from Users u
+    left join Orders o
+    on u.user_id = o.seller_id
+    left join Items i
+    on i.item_id = o.item_id
+), cte2 as
+(
+    select * 
+    from cte1
+    where ranks = 2 and favorite_brand = item_brand 
+)
+select c1.user_id as seller_id, (case when count(c2.ranks) >= 2 then 'yes' else 'no' end) as '2nd_item_fav_brand'
+from cte1 c1
+left join cte2 c2
+on c1.user_id = c2.user_id
+group by seller_id