refactor 1407

Author: fishercoder1534

database/_1407.sql

@@ -1,80 +1,3 @@
---1407. Top Travellers
---
---Table: Users
---
---+---------------+---------+
---| Column Name   | Type    |
---+---------------+---------+
---| id            | int     |
---| name          | varchar |
---+---------------+---------+
---id is the primary key for this table.
---name is the name of the user.
---
---
---Table: Rides
---
---+---------------+---------+
---| Column Name   | Type    |
---+---------------+---------+
---| id            | int     |
---| user_id       | int     |
---| distance      | int     |
---+---------------+---------+
---id is the primary key for this table.
---city_id is the id of the city who bought the product "product_name".
---
---
---Write an SQL query to report the distance travelled by each user.
---
---Return the result table ordered by travelled_distance in descending order, if two or more users travelled the same distance, order them by their name in ascending order.
---
---The query result format is in the following example.
---
---Users table:
---+------+-----------+
---| id   | name      |
---+------+-----------+
---| 1    | Alice     |
---| 2    | Bob       |
---| 3    | Alex      |
---| 4    | Donald    |
---| 7    | Lee       |
---| 13   | Jonathan  |
---| 19   | Elvis     |
---+------+-----------+
---
---Rides table:
---+------+----------+----------+
---| id   | user_id  | distance |
---+------+----------+----------+
---| 1    | 1        | 120      |
---| 2    | 2        | 317      |
---| 3    | 3        | 222      |
---| 4    | 7        | 100      |
---| 5    | 13       | 312      |
---| 6    | 19       | 50       |
---| 7    | 7        | 120      |
---| 8    | 19       | 400      |
---| 9    | 7        | 230      |
---+------+----------+----------+
---
---Result table:
---+----------+--------------------+
---| name     | travelled_distance |
---+----------+--------------------+
---| Elvis    | 450                |
---| Lee      | 450                |
---| Bob      | 317                |
---| Jonathan | 312                |
---| Alex     | 222                |
---| Alice    | 120                |
---| Donald   | 0                  |
---+----------+--------------------+
---Elvis and Lee travelled 450 miles, Elvis is the top traveller as his name is alphabetically smaller than Lee.
---Bob, Jonathan, Alex and Alice have only one ride and we just order them by the total distances of the ride.
---Donald didn't have any rides, the distance travelled by him is 0.
---
 --# Write your MySQL query statement below
 
 --credit: https://leetcode.com/problems/top-travellers/discuss/572803/MySQL-Simple-Solution