Completed MockSql1

[alokusw2]

No description provided.

[super30admin]

The student's solution appears to address the problem correctly based on the given requirements. Here are my observations:

Strengths:

1. Correctness: The SQL query properly joins the Users and Rides tables, handles NULL values with COALESCE, and groups by user ID and name to calculate the total distance traveled.
2. Ordering: The solution correctly implements the required ordering (distance descending, name ascending).
3. Readability: The query is well-formatted with clear indentation and line breaks.

Areas for Improvement:

1. While the solution handles NULL values with COALESCE, it might be worth mentioning that this is specifically for users who haven't taken any rides.
2. The GROUP BY clause includes both u.id and u.name. While this works (assuming name is functionally dependent on id), it's more standard to just GROUP BY u.id since it's presumably the primary key.
3. The example format could be improved by including sample input tables and expected output to better illustrate the solution.

Time Complexity: O(n + m) where n is number of users and m is number of rides (due to the join and group by operations)
Space Complexity: O(n) for storing the grouped results