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PowerFX Elegant Exclusion

In data manipulation, a “Set Difference” operation—returning items from Set A that are not in Set B—is a fundamental building block. SQL has EXCEPT, C# has .Except(), and Python has set.difference(). PowerFX, however, lacks a native Except(Table1, Table2) function. This omission becomes painfully obvious when building “Pick Once” UIs, such

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