added perc attended users in contest

Author: letsdeepchat

BASIC AGGREGATION FUNCTION/1633. Percentage of Users Attended a Contest.sql

@@ -0,0 +1,7 @@
+# Write your MySQL query statement below
+SELECT contest_id, ROUND((COUNT(DISTINCT user_id)*100)/(
+    SELECT COUNT(user_id) FROM Users
+), 2) AS percentage
+FROM Register
+GROUP BY contest_id
+ORDER BY percentage DESC, contest_id;

SUBQUERIES/1341. Movie Rating.sql

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+# Write your MySQL query statement below
+(SELECT name AS results
+FROM Users 
+INNER JOIN MovieRating USING(user_id)
+GROUP BY user_id
+ORDER BY COUNT(rating) DESC, name
+LIMIT 1)
+
+UNION ALL
+
+(SELECT title as results
+FROM Movies 
+INNER JOIN MovieRating USING(movie_id)
+WHERE MONTH(created_at) = '02' AND YEAR(created_at) = '2020'
+GROUP BY title
+ORDER BY AVG(rating) DESC, title
+LIMIT 1)