ClickHouse Analytics

Designs ClickHouse schemas and queries for fast analytics — MergeTree engine selection, ORDER BY key design, partitioning, materialized views, and projections. Use when someone asks "why is my ClickHouse query slow", "how should I order my sorting key", "should I use a materialized view or projection", "how do I deduplicate events", or is modeling an event or metrics table for OLAP. Do NOT use for tuning row-store…