top-travellers sql

.scripts/addnew

@@ -4,7 +4,7 @@ import Turndown from "turndown";
 import * as cheerio from "cheerio";
 import { client, gql } from "./graphql.mjs";
 
-const langExt = { python3: "py", nodejs: "js", cpp: "cpp" };
+const langExt = { python3: "py", nodejs: "js", cpp: "cpp", sql: "sql" };
 
 const link = await question("Enter leetcode problem link: ");
 const titleSlug = path.basename(new URL(link).pathname);

1541_top-travellers/README.md

@@ -0,0 +1,78 @@
+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.
+    user_id is the id of the user who traveled the distance "distance".
+    
+
+Write an SQL query 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**.
+
+The query result format is in the following example.
+
+**Example 1:**
+
+    Input: 
+    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      |
+    +------+----------+----------+
+    Output: 
+    +----------+--------------------+
+    | name     | travelled_distance |
+    +----------+--------------------+
+    | Elvis    | 450                |
+    | Lee      | 450                |
+    | Bob      | 317                |
+    | Jonathan | 312                |
+    | Alex     | 222                |
+    | Alice    | 120                |
+    | Donald   | 0                  |
+    +----------+--------------------+
+    Explanation: 
+    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.
+
+https://leetcode.com/problems/top-travellers/

1541_top-travellers/sql/solution.sql

@@ -0,0 +1,6 @@
+# Write your MySQL query statement below
+SELECT Users.name as name, COALESCE(SUM(distance), 0) as travelled_distance
+FROM Users
+LEFT JOIN Rides ON Users.id = Rides.user_id
+GROUP BY Users.id
+ORDER BY travelled_distance DESC, name ASC;