# Busiest Route by Passenger Volume

> The busiest route by volume.

Canonical URL: <https://datadriven.io/problems/busiest_route_by_passenger_volume>

Domain: SQL · Difficulty: medium · Seniority: L4

## Problem

Count click events (clicked = 1) per date for Friday impressions (day-of-week 5), restricted to users who have posted at least once in chat_msgs. Return the date (YYYY-MM-DD) and the count, sorted by date ascending.

## Related

- [All practice problems](https://datadriven.io/problems)
- [Mock interview mode](https://datadriven.io/interview/busiest_route_by_passenger_volume)
- [SQL Interview Questions](https://datadriven.io/sql-interview-questions)
- [Data Engineering Interview Prep Guide](https://datadriven.io/data-engineer-interview-prep)
- [Daily Challenge](https://datadriven.io/daily)

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