Python for Excel Users, Part 3: Merging Datasets and Replacing Your VLOOKUPs
VLOOKUP and XLOOKUP, but for files that don't fit in memory, joins on multiple keys, and many-to-many matches that VLOOKUP simply can't do.
XLOOKUP
// 9 postsPosts about XLOOKUP.
XLOOKUP posts
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The Excel Functions Your Spreadsheet Has Been Missing for Ten Years
XLOOKUP, LET, LAMBDA, BYROW, SCAN, MAP — Microsoft shipped more genuinely useful functions in the last three years than in the previous decade. If you learned Excel before 2022 and haven't revisite…
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Excel Formulas Are Getting Too Complex - And LAMBDA Is Why That's Actually Fine Now
The counter-argument to 'if your formula needs a scrollbar to read, it's wrong.' With LAMBDA, complexity lives in one named place and gets called cleanly everywhere else. The formula in your cell c…
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LAMBDA: How to Write the Excel Functions Microsoft Didn't
Before LAMBDA, every Excel function that existed was one Microsoft decided to write. After LAMBDA, you can write them yourself — naming the logic, hiding the complexity, and calling your custom fun…
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LET: How to Write Excel Formulas That You Can Actually Read Tomorrow
Complex formulas aren't the problem. Unreadable ones are. Before LET, you had to repeat the same range reference six times or accept that your formula was a black box. LET gives you named variables in
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3-Minute Win: Name Your Intermediate Formula Steps With LET
One tweak to your most-used formula and it suddenly reads like plain English. LET() lets you name the messy middle parts — so next month's you won't need to reverse-engineer what current you was …
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VLOOKUP Isn't Broken - You're Just Refusing to Move On
It works, so why change it? Because every workaround you've added to compensate for VLOOKUP's limits is technical debt in your spreadsheet - and it compounds. The cost isn't visible until somethi…
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Build a Drop-In XLOOKUP Upgrade for Every VLOOKUP in Your Workbook
Stop replacing VLOOKUPs. Your workbook deserves XLOOKUP without touching the formula.
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Dynamic arrays: FILTER, SORT, UNIQUE - what changed
I spent years writing 400-character Ctrl+Shift+Enter arrays just to filter a table, but the calculation engine finally changed the rules and killed that misery for good.