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  3. Analyzing Business Data in SQL

Exercise

MAU monitor (II)

Now that you've built the basis for Carol's MAU monitor, write a query that returns a table of months and the deltas of each month's current and previous MAUs.

If the delta is negative, less users were active in the current month than in the previous month, which triggers the monitor to raise a red flag so the Product team can investigate.

Instructions

100 XP
  • Fetch the previous month's MAU in the mau_with_lag CTE..
  • Select the month and the delta between its MAU and the previous month's MAU.
  • Order by month in ascending order.