Tabellab
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The same thing with a real PivotTable

  • Click any cell inside the data and choose Insert > PivotTable (tip: first press Ctrl+T to turn the data into a Table, so new rows are picked up on refresh).
  • In the PivotTable Fields pane, drag Category into Rows. Excel lists each category once and sorts it A→Z.
  • Drag Region above Category in Rows to get a two-level outline. Report Layout > Show in Tabular Form puts the two fields side by side, like our two-column UNIQUE.
  • The browser grid in these labs has no PivotTable button. Everything a PivotTable shows can also be built with formulas, and that is what you practise here.
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