Instruction
Good job! One more question to go.
Exercise
Create a customer retention chart in weekly signup cohorts. It should have the following columns:
yearweekpercent_active_10d(the percentage of customers still active 10 days after their registration).percent_active_30d(the percentage of customers still active 30 days after their registration).percent_active_60d(the percentage of customers still active 60 days after their registration).
Order the results by year and week.
Stuck? Here's a hint!




