Product Analytics. Part 2 Using helper table for date ranges

194. Using helper table for date ranges

This lesson teaches a very important trick when working with date ranges. Let’s examine the results of our retention curve query carefully:

WITH user_activity AS ( SELECT u.user_id, u.created_at::date AS signup_date, e.created_at::date AS activity_date, COUNT(*) AS events_counts FROM u LEFT JOIN e ON e.user_id = u.user_id WHERE u.action = 'signup' GROUP BY 1, 2, 3 ORDER BY signup_date ASC, user_id ASC ) SELECT activity_date, COUNT(DISTINCT(user_id)) AS active_users,...
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Anatoli Makarevich, author of SQL Habit About SQL Habit

Hi, it’s Anatoli, the author of SQL Habit. 👋

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-- Type your query here, for example this one -- lists all records from users table: SELECT * FROM users
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