[1633] [Time Beats: undefined] - LeetPush

Author: 0xEbrahim

1633-Percentage-of-Users-Attended-a-Contest.sql

@@ -0,0 +1,10 @@
+SELECT r.contest_id, ROUND(COUNT(u.user_id ) / (
+    SELECT COUNT(user_id)
+    FROM Users
+) * 100, 2) 
+AS percentage 
+FROM Register r
+LEFT JOIN Users u
+ON r.user_id = u.user_id
+GROUP BY r.contest_id
+ORDER BY percentage DESC, r.contest_id ASC