Have you noticed something strange about the query for the purchase rate?
SELECT 100 * COUNT(CASE WHEN status = 'customer' THEN id END) / COUNT(*) AS purchase_rate FROM users WHERE signup_date BETWEEN '2018-01-01' AND '2018-01-07'
The result should look something like this (just an example number, real query result might be different):
You’ll see a lot of examples of tables throughout the course. Please, keep in mind that the main purpose of such examples is to reflect the structure of the query results, not the actual...
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About SQL Habit
Hi, it’s Anatoli, the author of SQL Habit.
SQL Habit is a course (or, as some of the students say, “business simulator”). It’s based on a story of a fictional startup called Bindle. You’ll play a role of their Data Analyst and solve real-life challenges from Business, Marketing, and Product Management.
SQL Habit course is made of bite-sized lessons (you’re looking at one atm) and exercises. They always have a real-life setting and detailed explanations. You can immediately apply everything you’ve learned at work.