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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https://ymaho.com/car-t-therapy-for-lupus-100-remission-in-a-small-cohort
German rheumatologists achieved 100% remission in lupus with CAR-T. Four-year data, immune reset mechanism, and forecasts. Read.
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