Fix query to work in postgresql

main.rb

@@ -39,7 +39,7 @@ get '/' do
     SELECT
     COUNT(1) AS total,
     SUM(size) AS bytes
-    FROM (select size from downloads group by video_id) as x;
+    FROM (select MAX(size) AS size from downloads group by video_id) as x;
   ")[0]
 
   videos = ActiveRecord::Base.connection.execute("select count(1) AS total from videos;")[0]