Upload 156

Author: ggeerraarrdd

README.md

@@ -189,6 +189,7 @@ The problems and both submitted and site solutions are documented in individual
 | 153   | [Find Total Time Spent by Each Employee](https://leetcode.com/problems/find-total-time-spent-by-each-employee/description/)                                       | [Solution](solutions/153_find_total_time_spent_by_each_employee.md)                     | LeetCode    | Easy         |                                                                     |
 | 154   | [Find Users With Valid E-Mails](https://leetcode.com/problems/find-users-with-valid-e-mails/description/)                                                         | [Solution](solutions/154_find_users_with_valid_e_mails.md)                              | LeetCode    | Easy         | Regex                                                               |
 | 155   | [Actors and Directors Who Cooperated At Least Three Times](https://leetcode.com/problems/actors-and-directors-who-cooperated-at-least-three-times/description/)   | [Solution](solutions/155_actors_and_directors_who_cooperated_at_least_three_times.md)   | LeetCode    | Easy         |                                                                     |
+| 156   | [Top Travellers](https://leetcode.com/problems/top-travellers/description/)                                                                                       | [Solution](solutions/156_top_travellers.md)                                             | LeetCode    | Easy         |                                                                     |
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solutions/156_top_travellers.md

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+# SQL Everyday \#156
+
+## Top Travellers
+
+Site: LeetCode\
+Difficulty per Site: Easy
+
+## Problem
+
+Write a solution to report the distance traveled by each user.
+
+Return the result table ordered by `travelled_distance` in *descending order*, if two or more users traveled the same distance, order them by their `name` in *ascending order*. [[Full Description](https://leetcode.com/problems/top-travellers/description/)]
+
+## Submitted Solution
+
+```sql
+-- Submitted Solution
+WITH cte AS (
+    SELECT
+        user_id
+        ,SUM(distance) AS sum_distrance
+    FROM rides
+    GROUP BY user_id
+)
+SELECT
+    u.name
+    ,COALESCE(c.sum_distrance, 0) AS travelled_distance
+FROM Users AS u
+LEFT JOIN cte AS c ON u.id = c.user_id
+ORDER BY travelled_distance DESC, u.name ASC
+;
+```
+
+## Site Solution
+
+```sql
+-- LeetCode Solution 
+SELECT 
+    u.name, 
+    IFNULL(SUM(distance),0) AS travelled_distance
+FROM 
+    Users u
+LEFT JOIN 
+    Rides r
+ON 
+    u.id = r.user_id
+GROUP BY 
+    u.id
+ORDER BY 2 DESC, 1 ASC
+```
+
+## Notes
+
+TBD
+
+## NB
+
+TBD
+
+Go to [Index](../?tab=readme-ov-file#index)\
+Go to [Overview](../?tab=readme-ov-file)