There's a better way to find duplicate rows across sheets, and it doesn't require pulling your hair out over nested formulas. The problem posted by u/Neon_Banana_Pickle is one we see every day: a user with fresh data in one sheet and old data in another, trying to match five columns at once. The formula keeps failing, either returning too many arguments or only checking a single column. The frustration is real, but the solution is simpler than most people think.
The core issue here is that traditional spreadsheets treat multi-column matching as an advanced trick. You need to concatenate columns A through E into a single helper column, then use MATCH or COUNTIF on that combined string. Alternatively, you can use an array formula with SUMPRODUCT or, in modern tools, leverage conditional formatting with a custom formula like =SUMPRODUCT((Sheet2!$A$1:$A$100=$A1)*(Sheet2!$B$1:$B$100=$B1)*(Sheet2!$C$1:$C$100=$C1)*(Sheet2!$D$1:$D$100=$D1)*(Sheet2!$E$1:$E$100=$E1))>0. That will highlight any row in Sheet1 where all five columns match a row in Sheet2. It's not intuitive, and it requires the user to manually craft a formula that traditional spreadsheet software treats as obscure rather than standard. That's the old way.
What this really tells us is that the technology should adapt to the user, not the other way around. If you're spending time debugging error messages or searching forums for workarounds, the tool is failing you. An AI-native spreadsheet can interpret a plain‑language request like "highlight rows in Sheet1 where columns A through E match any row in Sheet2" and execute it instantly, no formula required. This isn't about adding another feature. It's about rethinking how data tasks are communicated. The user's goal is to avoid reusing old data, not to become an expert in nested functions. When the tool understands the intent, the manual headache disappears.
For anyone currently wrestling with this exact problem, here's the practical takeaway: don't settle for a tool that makes you engineer your own solutions. The fact that a simple multi‑column duplicate check requires forum posts and workarounds is a sign that the legacy spreadsheet model has reached its limit. Our position is straightforward: it's time to explore tools that speak your language, not just formula syntax. Your next project shouldn't start with a search for "how to match multiple columns." It should start with your data.