Telegram Group & Telegram Channel
Forwarded from Pavel V
Таблица web_events — 100 млн строк.
Колонки:
a) device_type — 'Mobile', 'Tablet', 'Desktop'; b) browser — 8 типов; c) country_code — 50 значений; d) event_time — временная метка; e) event_type — 'CLICK', 'VIEW', 'PURCHASE' Что будет наиболее эффективно?
Anonymous Quiz
Один составной B-tree (device_type, browser, country_code, event_type)
Bitmap по device_type, browser, country_code, event_type
Только индекс по event_time
Не индексировать — таблица и так летает
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