https://sudonull.com/clickhouse-aggregate-functions-uniqhll12-quantiletdigest-topk
uniqHLL12 for fast unique users, quantileTDigest for distributions, groupArray, topK, -If combinators. Examples of GGR, cohorts, retention.
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In this project
https://sudonull.com/yahoo-strategy-aggregation-ai-search-scout-and-advertising-dsp-platforms
How Yahoo returns to the roots of content aggregation, launches AI search engine Scout and focuses on DSP for advertising. Strategy analysis for IT audience.
https://sudonull.com/three-data-aggregation-errors-in-bi-systems
Learn why BI systems lie: mathematical errors in averaging, count distinct, and snapshot metrics. How to build analytics without distortions.
https://sudonull.com/ddd-in-asp-net-scalability-issues-after-30-aggregates
Breaking down why classic DDD with EF Core slows down in projects with 30+ aggregates: heavy queries, specifications, transactions. Hybrid approaches for optimization. Learn how to speed up development.
From other projects
https://ymaho.com/dex-trading-models-explained-amm-vs-aggregator-vs-batch
Learn how Uniswap, 1inch, and CoW Protocol handle crypto trades differently. Discover which model protects your price and saves fees.
https://lrivo.com/psg-beat-liverpool-4-0-on-aggregate-in-champions-league-quarter-final
Ousmane Dembélé scores twice as PSG end Liverpool's Champions League hopes. Read analysis of the key moments and controversial decisions from Anfield.
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