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One of the most common performance bottlenecks in analytics is running the same expensive aggregations over and over again. Imagine querying billions of rows every time a dashboard loads just to calculate daily events, page views, or user activity. As your data grows, those queries become slower and consume more CPU. This is exactly the problem Materialized Views solve in ClickHouse®. Instead of performing aggregations during query execution, a Materialized View processes new data as it’s inserted and writes the transformed or aggregated results into a separate target table. A few important concepts every ClickHouse developer should know: • Materialized Views process only newly inserted data blocks —they don’t rescan the entire source table. • Existing data isn’t included automatically. Wh
Полный текст и контекст у первоисточника: https://dev.to/kanishga_subramani_49ad73/day-20-of-100-days-of-clickhouser-introduction-to-materialized-views-4f6p