add leetcode problem-cn part1

算法题（国内版）/problem (English)/排名靠前的旅行者(English) [top-travellers].html

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+<p>Table: <code>Users</code></p>
+
+<pre>
++---------------+---------+
+| Column Name   | Type    |
++---------------+---------+
+| id            | int     |
+| name          | varchar |
++---------------+---------+
+id is the primary key for this table.
+name is the name of the user.
+</pre>
+
+<p>&nbsp;</p>
+
+<p>Table: <code>Rides</code></p>
+
+<pre>
++---------------+---------+
+| Column Name   | Type    |
++---------------+---------+
+| id            | int     |
+| user_id       | int     |
+| distance      | int     |
++---------------+---------+
+id is the primary key for this table.
+user_id is the id of the user who traveled the distance &quot;distance&quot;.
+</pre>
+
+<p>&nbsp;</p>
+
+<p>Write an SQL query to report the distance traveled by each user.</p>
+
+<p>Return the result table ordered by <code>travelled_distance</code> in <strong>descending order</strong>, if two or more users traveled the same distance, order them by their <code>name</code> in <strong>ascending order</strong>.</p>
+
+<p>The query result format is in the following example.</p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> 
+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      |
++------+----------+----------+
+<strong>Output:</strong> 
++----------+--------------------+
+| name     | travelled_distance |
++----------+--------------------+
+| Elvis    | 450                |
+| Lee      | 450                |
+| Bob      | 317                |
+| Jonathan | 312                |
+| Alex     | 222                |
+| Alice    | 120                |
+| Donald   | 0                  |
++----------+--------------------+
+<strong>Explanation:</strong> 
+Elvis and Lee traveled 450 miles, Elvis is the top traveler 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 did not have any rides, the distance traveled by him is 0.
+</pre>