Fragmenting your data across many Excel tabs is a common habit that silently kills file performance, introduces hidden errors ...

Learn when FILTER beats XLOOKUP, when it does not, and how to handle multiple matches, nth items, and multi-condition lookups with clear steps.

The @ symbol can also appear in regular formulas outside of tables when Excel thinks you're trying to reference a single value from a range. If you see it pop up unexpectedly, it usually means Excel ...

Can you call a DAX UDF from Power BI Copilot? I was asked this question by Jake Duddy during the livestream on Power BI ...