Driver Utilization
Utilisation review at UrbanHop asks a blunt question about each driver: how much work did they actually deliver? Bookings that were cancelled are not work — the driver may have been inconvenienced, but nothing was delivered and nothing was earned — so only completed trips count towards the figure.
The bookings identify a driver by number, and the review is read by a city manager who knows her drivers by name. A driver with no completed trips at all has no utilisation to review and does not appear on the sheet.
rides — one row per booking. rider_id points at a row in riders and driver_id at a row in drivers. distance_km is the trip length in kilometres and fare the price in dollars; both are recorded when the booking is made, so a booking that never happened still carries them. status is either completed or cancelled. ride_date is the day the ride was booked for.
| id | rider_id | driver_id | distance_km | fare | ride_date | status |
|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 5.2 | 12.5 | 2023-06-01 | completed |
| 2 | 1 | 4 | 3.0 | 8.0 | 2023-06-03 | completed |
| 3 | 2 | 2 | 10.0 | 22.0 | 2023-06-02 | completed |
| 4 | 3 | 1 | 2.1 | 6.5 | 2023-06-05 | cancelled |
| 5 | 3 | 4 | 4.4 | 11.0 | 2023-06-06 | completed |
| 6 | 4 | 3 | 7.8 | 18.0 | 2023-06-04 | completed |
| 7 | 5 | 2 | 1.5 | 5.0 | 2023-06-07 | cancelled |
| 8 | 2 | 2 | 12.3 | 26.5 | 2023-06-10 | completed |
| 9 | 1 | 1 | 6.6 | 15.0 | 2023-06-12 | completed |
| 10 | 4 | 3 | 3.3 | 9.0 | 2023-06-15 | completed |
| 11 | 5 | 2 | 8.8 | 19.5 | 2023-06-18 | completed |
| 12 | 3 | 4 | 2.9 | 7.5 | 2023-06-20 | cancelled |
drivers — one row per driver on the platform. rating is their running star rating out of 5, and city is the city they drive in.
| id | name | city | rating |
|---|---|---|---|
| 1 | Sam Rios | Austin | 4.9 |
| 2 | Priya Desai | Denver | 4.6 |
| 3 | Oscar Lund | Seattle | 4.8 |
| 4 | Nina Cole | Austin | 4.2 |
Both tables already exist in the database — there is nothing to create or load.
Task: Write a query that returns one row per driver with at least one completed trip, with their name and how many completed trips they delivered as trips. Busiest first; drivers on the same number of trips are separated alphabetically by name.
Example output
Shape only — these drivers and counts are invented:
| name | trips |
|---|---|
| Dana Fox | 7 |
| Milo Reyes | 5 |
| Rosa Vega | 5 |
| Tariq Bell | 2 |
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