Learn how GROUPBY passes both subset and full arrays into LAMBDA in Excel, letting you compute percent shares fast and explain results clearly.
Learn the difference between Excel COUNT and COUNTA, plus TEXTBEFORE and TEXTAFTER tricks, so you clean text and totals with ...
Unlike SUM, which ignores filters, SUBTOTAL dynamically adjusts to display only visible data. It offers 11 built-in functions, with additional options (101-111) that account for hidden rows. When ...
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