Learn how to deal with Power Query Error: Formula.Firewall: Query references other queries or steps, so it may not directly access a data source. Please rebuild this data combination. Two solutions are presented in this video.
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Assigned Homework - these are problems for you to practice your new M Code skills:
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Comprehensive Microsoft Power Tools for Data Analysis Class, BI 348, taught by Mike Girvin, Excel MVP and Highline College Professor.
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