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https://www.dutchdatadude.com/default-behavior-of-power-bi-is-to-show-blank-when-there-is-nothing-even-when-summing-a-numerical-column-that-happens-to-be-all-empty-but-what-if-you-want-to-show-0-instead-well-with-coalesce-yo/
Power BI Pro Tip: show 0 instead of (Blank)