SELECT driver_id, COUNT(*) AS ride_count FROM rides WHERE ride_date >= CURRENT_DATE - 30 GROUP BY driver_id ORDER BY ride_count DESC. **Why**: Simple aggregation with date filter. **Production**: Consider ride status (completed vs cancelled); adjust date column.
This medium-level SQL question appears frequently in data engineering interviews at companies like Uber. While less common, it tests deeper understanding that distinguishes strong candidates.
Break this problem into components. Identify the core trade-offs involved, then walk the interviewer through your reasoning step by step. Demonstrate awareness of edge cases and production considerations - this is what separates good answers from great ones.
SELECT driver_id, COUNT(*) AS ride_count FROM rides WHERE ride_date >= CURRENT_DATE - 30 GROUP BY driver_id ORDER BY ride_count DESC. Why: Simple aggregation with date filter. Production: Consider ride status (completed vs cancelled); adjust date column.
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Analyze My Answer — FreeAccording to DataEngPrep.tech, this is one of the most frequently asked SQL interview questions, reported at 1 company. DataEngPrep.tech maintains a curated database of 1,863+ real data engineering interview questions across 7 categories, verified by industry professionals.