The Trips That Happened
UrbanHop is raising its next funding round, and the figure at the top of the investor deck is completed trips. The word completed is doing real work there: a booking that was cancelled put nothing in a driver's pocket and moved nobody anywhere, so counting it would overstate the business.
Every booking is kept on record, cancelled ones included, because ops needs them for supply analysis. That means the table holds more rows than the number the deck wants, and telling the two apart is the exercise.
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 |
The table already exists in the database — there is nothing to create or load.
Task: Write a query that returns one row with one column, completed_rides, holding how many bookings have a status of completed.
Example output
If the fleet had finished forty-one trips, the single row would read:
| completed_rides |
|---|
| 41 |
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