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Hi fellows ) I need to find some % the relation of the active audience in this temporal interval to registered in previous (for example if in a week 1 at us 100 users registered, and in a week 2 from them came 20, churn rate will be 20%).
So i has the next fields: "login_user_id" and "reg_date" it's User ID and Timestamp of his registration. And i thought that active audience this is the users who having registered 1 time within a week came into game at least. And i can't understand how to build right expression.
Thnx! I hope for the help )