problem 1 and problem 2 added

problem1-1194-tournament-winners.sql

@@ -0,0 +1,41 @@
+with player_id_score as(
+select
+    first_player as player,
+    first_score as score
+from
+Matches
+
+union all
+
+select
+    second_player as player,
+    second_score as score
+from
+  Matches )
+
+, total_score_player as (
+select
+    player as player_id,
+    sum(score) as total_score
+ from player_id_score
+group by player
+order by player
+)
+
+, player_with_rnk  as (
+select
+    players.player_id,
+    players.group_id,
+    ROW_number() over (partition by group_id order by total_score desc,player_id) as rnk
+from
+   total_score_player tsp
+inner join
+   players
+on
+  tsp.player_id = players.player_id
+)
+
+select group_id,player_id
+from
+player_with_rnk
+where rnk = 1

problem2-1159-market-analysis2.sql

@@ -0,0 +1,37 @@
+with user_item_sell_row_num as
+(
+    select
+        seller_id,
+        item_id,
+        ROW_NUMBER() over (partition by seller_id order by order_date) as rnk
+    from
+        Orders
+)
+
+, item_name_rnk as(
+
+    select
+      uswrnk.item_id,
+      uswrnk.seller_id,
+      Items.item_brand
+    from
+    user_item_sell_row_num uswrnk
+    inner join
+    Items
+    on uswrnk.item_id = Items.item_id
+    where uswrnk.rnk = 2
+
+)
+
+select
+   Users.user_id as seller_id,
+   case
+      when item_name_rnk.item_brand = Users.favorite_brand then 'yes'
+      when item_name_rnk.item_brand != Users.favorite_brand then 'no'
+      when item_name_rnk.item_brand is null then 'no'
+      End AS 2nd_item_fav_brand
+from
+Users
+left join
+item_name_rnk
+on Users.user_id = item_name_rnk.seller_id