<h3 id="heading-problem-description-amp-analysis">Problem description &amp; analysis:</h3>
Here below is a personnel data table:
<img src="https://miro.medium.com/v2/resize:fit:800/1*L_rQbl7YdEv5NbOLYa9h_w.png" alt />
Task: Identify whether there are duplicate data, if so, fill in 1 in the corresponding Dup field, otherwise fill in 0 (the identifying basis is that the data in the Name field are the same).
<h3 id="heading-solution">Solution:</h3>
Use SPL XLL and rnter the formula in cell E2:
<pre><code class="lang-plaintext">=spl("=if(?1.conj().select(~==?2).count()&gt;1,1,0)",B$2:B$7,B2)
</code></pre>
Then drag E2 down to every relevant row:
<img src="https://miro.medium.com/v2/resize:fit:852/1*WEk2GD3Sj5yGh4doqv2XEQ.png" alt />
<hr />
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✨Plugin Installation Method: <a target="_blank" href="https://c.scudata.com/article/1652061135502">SPL XLL Installation and Configuration</a>
✨References to other rich Excel operation cases: <a target="_blank" href="https://www.scudata.com/html/Desktop-and-Excel-Data-Processing-Cases.html">Desktop and Excel Data Processing Cases</a>
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### Problem description & analysis:

Here below is a personnel data table:

![](https://miro.medium.com/v2/resize:fit:800/1*L_rQbl7YdEv5NbOLYa9h_w.png align="left")

**Task**: Identify whether there are duplicate data, if so, fill in 1 in the corresponding Dup field, otherwise fill in 0 (the identifying basis is that the data in the Name field are the same).

### Solution:

Use **SPL XLL** and rnter the formula in cell E2:

```plaintext
=spl("=if(?1.conj().select(~==?2).count()>1,1,0)",B$2:B$7,B2)
```

Then drag E2 down to every relevant row:

![](https://miro.medium.com/v2/resize:fit:852/1*WEk2GD3Sj5yGh4doqv2XEQ.png align="left")

---

Download esProc Desktop for FREE and improve your data processing workflows!!! 🚀🔥⬇️

✨SPL download address: [esProc Desktop FREE Download](http://www.scudata.com/download-Desktop)

✨Plugin Installation Method: [SPL XLL Installation and Configuration](https://c.scudata.com/article/1652061135502)

✨References to other rich Excel operation cases: [Desktop and Excel Data Processing Cases](https://www.scudata.com/html/Desktop-and-Excel-Data-Processing-Cases.html)

✨YouTube FREE courses: [SPL Programming](https://www.youtube.com/playlist?list=PLQeR-IhHo7qNCw6o7PW8YfHvRx8pgzZso)

#96 — Identify Duplications of Row-Based Data — by Key Column

Problem description & analysis:

Solution: