Last Person to Board the Bus
Problem
**[Classic — asked at multiple companies including Uber, DoorDash]**
People queue to board a bus with a **1 000 kg weight limit**. They board in
`turn` order (turn=1 first). Each person boards only if the cumulative weight
does NOT exceed 1 000 kg.
Find the `person_name` of the **last person who can board** without the
total exceeding 1 000 kg.
Tables
Example rows — the live problem includes the full dataset.
queue
| person_id | person_name | weight | turn |
|---|
Expected output
Your answer should return 1 row with the columns person_name.
Starter code (SQL)
SELECT *
FROM queue;Solve this SQL question free
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Solution & explanation
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