Sort for Storage Optimization — The Production Insight That Wins Interviews

The most impressive thing a mid-level DE candidate can do in a sorting interview is connect the algorithm to storage design. Sorting isn't just for output ordering — it's a core primitive in join optimization, data skipping, and storage layout. This section gives you the vocabulary to talk about sorting at the systems level, which is what separates a 'hire' from a 'strong hire' at this level. Sort Keys in Data Warehouses — Redshift, Snowflake, Delta