mock3.sql

mock3.sql

@@ -0,0 +1,15 @@
+
+# Write your MySQL query statement below 1194
+WITH CTE AS (
+SELECT match_id, first_player AS player, first_score as score FROM Matches
+UNION ALL
+SELECT match_id, second_player AS player, second_score as score FROM Matches
+)
+SELECT group_id, player_id FROM(
+SELECT group_id, player_id, 
+RANK() OVER(PARTITION BY group_id ORDER BY points DESC, player_id ASC) as rnk, points
+FROM (
+    SELECT group_id, player_id, SUM(score) AS points
+    FROM CTE C LEFT JOIN Players P ON C.player = P.player_id
+    GROUP BY player, group_id) AS random) AS random2
+WHERE rnk = 1;