Completed Mock-SQL-3

README.md

@@ -1 +1,47 @@
-# Mock-SQL-3
+# Mock-SQL-3   
+
+
+1: Market-Analysis- II 
+
+
+Write a solution to find for each user whether the brand of the second item (by date) they sold is their favorite brand. If a user sold less than two items, report the answer for that user as no. It is guaranteed that no seller sells more than one item in a day.
+
+Return the result table in any order.
+--------------------------------------------------------------------------------------------------------
+
+
+SELECT user_id
+FROM Users
+WHERE user_id IN (SELECT DISTINCT user_id FROM Orders)
+AND join_date BETWEEN '2019-01-01' AND '2019-12-31';
+
+
+
+
+
+--------------------------------------------------------------------------------------------------------
+
+2:  Tournament Winners 
+
+The winner in each group is the player who scored the maximum total points within the group. In the case of a tie, the lowest player_id wins.
+
+Write a solution to find the winner in each group.
+
+Return the result table in any order.
+
+
+
+
+
+--------------------------------------------------------------------------------------------------------
+
+SELECT winner FROM Matches
+GROUP BY winner
+HAVING COUNT(*) >= ALL(SELECT COUNT(*) FROM Matches GROUP BY winner);
+
+
+
+
+
+
+--------------------------------------------------------------------------------------------------------