Excel validation lists avoid blanks and errors with TOCOL(ignore) plus FILTER; the spill range stays stable across worksheets ...
Follow the steps below to create a drop-down list using data validation in Excel. If you want to add a message pop up, you can click the Input Message tab and check the checkbox for “Show input ...
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Why I'm swapping my PivotTables for the PIVOTBY function in Excel
PivotTables are static relics; PIVOTBY is the responsive, resilient, and fully auditable future of the modern Excel professional.
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