ORDER BY & Sorting: Real-World

Every application needs sorted data - product listings by price, customer lists by name, order history by date, leaderboards by score. ORDER BY is used in pagination, top-N queries, and report generation. Understanding sort performance prevents slow queries on large datasets.

Deterministic incident queue

Operations needs the highest-severity incidents first, then the oldest incident, with stable ordering when timestamps tie.

A unique tie-breaker keeps pagination and operational handoffs predictable.

Define the complete business order

SELECT incident_id, severity, created_at FROM incidents ORDER BY severity DESC, created_at ASC, incident_id ASC;

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