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Problème
La table user_monthly_visit contient une ligne par appareil. Pour calculer, le nombre de visite sur 1 mois, il faut faire un "GROUP BY user_id" cette opération est couteuse et échoue dans metabase
Solution
Nouvelle table month_unique_user_count avec une ligne par utilisateur par mois.
Cela permet de calculer des totaux d'utilisateurs actifs par mois beaucoup rapidement et de filtrer si besoin les données par catégorie.
Nodes
Test en cours sur la DB de stats