Sponsored by Databricks. Databricks commissioned and funded this guide and reviewed it before publication for factual accuracy. They did not get to change the conclusions.
Full disclosure at the foot of this post.
A badly written data request rarely gets refused. It gets built.
That is the part people miss when they complain about the queue. You ask for lapsed customers, three weeks later you get lapsed customers, and the team who built it did exactly what the message said. Then the campaign underperforms and nobody can point at the mistake, because there was not one.
Lapsed meant a

