Answer SQL And Data Warehouse Fundamentals For A Data Engineering Interview
Company: Clickhouse
Role: Data Engineer
Category: Data Manipulation (SQL/Python)
Difficulty: medium
Interview Round: Technical Screen
Overview: Practice data engineering fundamentals across SQL set operations, anti-joins, top-N window queries, and warehouse modeling. The prompt covers UNION versus UNION ALL, null-safe anti-joins, star schemas, fact table types, slowly changing dimensions, and high-volume sensor modeling.