Create Top Competitors.sql

Author: imranpollob

Basic Join/Top Competitors.sql

@@ -0,0 +1,14 @@
+SELECT h.hacker_id,
+       h.NAME
+FROM   submissions s
+       LEFT JOIN hackers h
+              ON s.hacker_id = h.hacker_id
+       LEFT JOIN challenges c
+              ON s.challenge_id = c.challenge_id
+       LEFT JOIN difficulty d
+              ON c.difficulty_level = d.difficulty_level
+WHERE  s.score = d.score
+GROUP  BY h.hacker_id
+HAVING( Count(*) > 1 )
+ORDER  BY Count(*) DESC,
+          s.hacker_id;