241. Timeline reports

This lesson is based on theLive dataset.

Another way to visualize trends is to use line charts 📈 or bar charts 📊.

By now we’ve written a ton of those queries, it’s a simple grouping by date and counting. We just need to spice it up with a filter relative to the current timestamp:

SELECT created_at::date AS date, COUNT(*) FROM users WHERE created_at > now() - '30 days'::interval GROUP BY 1 ORDER BY 1 DESC

💡 Go ahead and draw a chart for that query. 📊

This timeline query is very powerful, it’s a template for any table that contains a timestamp field (created_at or anything_happened_at)....

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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
LIMIT 500
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