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class="breadcrumbs__item"><a class="breadcrumbs__link" itemprop="item" href="/de-intern-guide/category/-qsv"><span itemprop="name">⚡ qsv</span></a><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">⚡ qsv</span><meta itemprop="position" content="2"></li></ul></nav><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>⚡ qsv</h1><p>Meet <strong>qsv</strong>, your new command line tool for data wrangling!</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="-whats-qsv">💭 What's qsv?<a href="#-whats-qsv" class="hash-link" aria-label="Direct link to 💭 What's qsv?" title="Direct link to 💭 What's qsv?"></a></h2><p>qsv is a command line tool with 50+ commands that can perform data wrangling tasks in a relatively efficient manner.</p><p>For example, if I had a csv file that looked like this:</p><div class="language-csv codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockTitle_Ktv7">prices.csv</div><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-csv codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">id,fruit,cost</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">1,apple,5.00</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">2,banana,10.00</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">3,celery,2.00</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>Then I can use qsv to perform all sorts of commands based on the data. Maybe I want to simply count how many rows there are (not including the header row). I can run:</p><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">qsv count prices.csv</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>And the output would be <code>3</code>. But I can add flags for even more options like additionally getting the number of characters in the longest row by adding <code>--width</code> (e.g., <code>qsv count prices.csv --width</code>), and other commands also have subcommands!</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="-cool-features">✨ Cool Features<a href="#-cool-features" class="hash-link" aria-label="Direct link to ✨ Cool Features" title="Direct link to ✨ Cool Features"></a></h2><ul><li><strong>50+ commands:</strong> There's plenty of options for users for all sorts of backgrounds to use qsv in their workflow</li><li><strong>Blazingly fast:</strong> qsv is built primarily with the Rust programming language, offering fast speeds even for very large datasets</li><li><strong>Mix and match:</strong> Combine different qsv commands and integrate qsv with other tools to enhance data wrangling</li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="-install-qsv">🛠 Install qsv<a href="#-install-qsv" class="hash-link" aria-label="Direct link to 🛠 Install qsv" title="Direct link to 🛠 Install qsv"></a></h2><ol><li><a href="/de-intern-guide/onboarding/qsv-setup">Install qsv</a>.</li><li>Once installed, run <code>qsv --list</code> to list the commands available to you, and you can further learn about them by running <code>qsv <command> --help</code> where <code><command></code> is the command you want to learn about (e.g., <code>qsv count --help</code>).</li><li>Try running qsv commands on your files!</li></ol><h2 class="anchor anchorWithStickyNavbar_LWe7" id="-your-first-command-qsv-count">📊 Your first command: <code>qsv count</code><a href="#-your-first-command-qsv-count" class="hash-link" aria-label="Direct link to -your-first-command-qsv-count" title="Direct link to -your-first-command-qsv-count"></a></h2><p>Navigate to your desired <code>.csv</code> file on the terminal and try typing <code>qsv count <filename></code> (where <code><filename></code> is the name of your file) and see what happens!</p><p>See if you can try following along in <a href="https://nbviewer.org/github/jqnatividad/qsv/blob/master/contrib/notebooks/intro-to-count.ipynb" target="_blank" rel="noopener noreferrer">the intro-to-count.ipynb notebook</a>.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="-ready-for-some-data-wrangling">🚀 Ready for some data wrangling?<a href="#-ready-for-some-data-wrangling" class="hash-link" aria-label="Direct link to 🚀 Ready for some data wrangling?" title="Direct link to 🚀 Ready for some data wrangling?"></a></h2><p>That's just the beginning! Explore more commands, use qsv to perform various transformations, and have fun wrangling data with qsv!</p><p>Remember, qsv can help make data exciting and easy, even if you're just starting on your data journey!</p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/dathere/de-intern-guide/tree/main/docs/qsv/qsv-cli.mdx" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_vwxv"></div></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/de-intern-guide/qsv/100"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">📖 100.dathere.com</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/de-intern-guide/qsv/qsv-pro"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">💻 qsv pro</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#-whats-qsv" class="table-of-contents__link toc-highlight">💭 What's qsv?</a></li><li><a href="#-cool-features" class="table-of-contents__link toc-highlight">✨ Cool Features</a></li><li><a href="#-install-qsv" class="table-of-contents__link toc-highlight">🛠 Install qsv</a></li><li><a href="#-your-first-command-qsv-count" class="table-of-contents__link toc-highlight">📊 Your first command: <code>qsv count</code></a></li><li><a href="#-ready-for-some-data-wrangling" class="table-of-contents__link toc-highlight">🚀 Ready for some data wrangling?</a></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container container-fluid"><div class="row footer__links"><div class="col footer__col"><div class="footer__title">datHere Socials</div><ul class="footer__items clean-list"><li class="footer__item"><a href="https://dathere.com" target="_blank" rel="noopener noreferrer" class="footer__link-item">Website<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://github.com/dathere" target="_blank" rel="noopener noreferrer" class="footer__link-item">GitHub<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://www.linkedin.com/company/dathere/" target="_blank" rel="noopener noreferrer" class="footer__link-item">LinkedIn<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div><div class="col footer__col"><div class="footer__title">More</div><ul class="footer__items clean-list"><li class="footer__item"><a href="https://dathere.com/blog/" target="_blank" rel="noopener noreferrer" class="footer__link-item">Blog<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div></div><div class="footer__bottom text--center"><div class="footer__copyright">Copyright © 2025 datHere, Inc. 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