At companies like FleetOps, operational dashboards often need both row-level filtering and group-level filtering. Interviewers ask this to confirm that you understand when filtering happens in SQL execution.
Explain the difference between WHERE and HAVING in SQL. In your answer, cover:
WHERE cannot usually filter aggregate results directlyKeep the explanation practical. The interviewer is usually looking for a clear distinction between row-level filtering and post-aggregation filtering, plus one or two examples of common mistakes such as using HAVING when WHERE is more appropriate.