Because Your Pets Deserve More Than “Just a Walk” Your dog isn’t just a dog. And your cat? They probably
SQL BigQuery. Check if user bought something previous month = old, if he didn’t buy anything next month = churn
What we have: user_id month —- 2021-08 1414 2021-09 1414 2021-10 1414 2021-11 —- 2021-12 What we need: user_id month —- 2021-08 1414 2021-09 new
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