Impossible de créer l'index cluster '%1' dans la vue '%2', car la clé d'index contient des colonnes qui ne figurent pas dans la clause GROUP BY. Supprimez les colonnes qui ne sont pas dans la clause GROUP BY de la clé d'index.
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English version
Cannot create the clustered index "%1" on view "%2" because the index key includes columns that are not in the GROUP BY clause. Consider eliminating columns that are not in the GROUP BY clause from the index key.
SQL Server