<section>
 <h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
  $sample (aggregation)
  <a class="headerlink leafygreen-ui-1kepx47" href="#-sample--aggregation-" title="Permalink to this heading">
   <svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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    </path>
    <path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
    </path>
   </svg>
   <div class="css-1btu0w3 evvkmar0" id="-sample--aggregation-">
   </div>
  </a>
 </h1>
 <div class="leafygreen-ui-a5yxub">
  <p class="css-1cmx2d4 ef7gu8j0">
   On this page
  </p>
  <ul class="css-1qb0mst ef7gu8j1">
   <li class="leafygreen-ui-1e7a0ei">
    <a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
     <span>
      Definition
     </span>
    </a>
   </li>
   <li class="leafygreen-ui-1jqtqlb">
    <a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
     <span>
      Behavior
     </span>
    </a>
   </li>
   <li class="leafygreen-ui-1jqtqlb">
    <a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
     <span>
      Example
     </span>
    </a>
   </li>
  </ul>
 </div>
 <section>
  <h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
   Definition
   <a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
    <svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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     </path>
     <path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
     </path>
    </svg>
    <div class="css-1btu0w3 evvkmar0" id="definition">
    </div>
   </a>
  </h2>
  <dl class="pipeline">
   <dt>
    <code class="leafygreen-ui-1l06pbn">
     $sample
    </code>
    <a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-pipeline-pipe.-sample" title="Permalink to this definition">
     <svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
      <path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
      </path>
      <path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
      </path>
     </svg>
     <div class="css-1btu0w3 evvkmar0" id="mongodb-pipeline-pipe.-sample">
     </div>
    </a>
   </dt>
   <dd>
    <p class="leafygreen-ui-1kp3ins">
     Randomly selects the specified number of documents from the
input documents.
    </p>
    <p class="leafygreen-ui-1kp3ins">
     <a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-pipeline-pipe.-sample" target="_self">
      <span>
       <code class="leafygreen-ui-1l06pbn">
        $sample
       </code>
      </span>
     </a>
     stage syntax:
    </p>
    <script class="structured_data" type="application/ld+json">
     {"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $sample: { size: &lt;positive&gt; } }","programmingLanguage":"JavaScript"}
    </script>
    <div class="css-16lmvu9">
     <div class="leafygreen-ui-196mwvg">
      <div class="leafygreen-ui-yzcs8i">
       <pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$sample</span>: <!-- -->{ <span class="lg-highlight-attr">size</span>: <span class="lg-highlight-tag lg-highlight-xml">&lt;</span><span class="lg-highlight-name lg-highlight-tag lg-highlight-xml">positive</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">integer</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">N</span><span class="lg-highlight-tag lg-highlight-xml">&gt;</span><span class="lg-highlight-xml"> } }</span></td></tr></tbody></table></code></pre>
       <div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
        <button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
         <div class="leafygreen-ui-xhlipt">
          <svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
           <path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
           </path>
          </svg>
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        </button>
       </div>
      </div>
     </div>
    </div>
    <p class="leafygreen-ui-1kp3ins">
     <code class="leafygreen-ui-1l06pbn">
      N
     </code>
     is the number of documents to randomly select.
Set
     <code class="leafygreen-ui-1l06pbn">
      N
     </code>
     to an integer greater than or equal to
     <code class="leafygreen-ui-1l06pbn">
      1
     </code>
     .
    </p>
   </dd>
  </dl>
 </section>
 <section>
  <h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
   Behavior
   <a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
    <svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
     <path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
     </path>
     <path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
     </path>
    </svg>
    <div class="css-1btu0w3 evvkmar0" id="behavior">
    </div>
   </a>
  </h2>
  <p class="leafygreen-ui-1kp3ins">
   If all of the following conditions are true,
   <a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-pipeline-pipe.-sample" target="_self">
    <span>
     <code class="leafygreen-ui-1l06pbn">
      $sample
     </code>
    </span>
   </a>
   uses a
pseudo-random cursor to select the
   <code class="leafygreen-ui-1l06pbn">
    N
   </code>
   documents:
  </p>
  <ul class="leafygreen-ui-rioki0">
   <li class="leafygreen-ui-d7p7b6">
    <p class="leafygreen-ui-1kp3ins">
     <a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-pipeline-pipe.-sample" target="_self">
      <span>
       <code class="leafygreen-ui-1l06pbn">
        $sample
       </code>
      </span>
     </a>
     is the first stage of the pipeline.
    </p>
   </li>
   <li class="leafygreen-ui-d7p7b6">
    <p class="leafygreen-ui-1kp3ins">
     <code class="leafygreen-ui-1l06pbn">
      N
     </code>
     is less than 5% of the total documents in the collection.
    </p>
    <div class="leafygreen-ui-15mdk4" role="note">
     <h2 class="leafygreen-ui-6n7b7d">
      Note
     </h2>
     <div class="leafygreen-ui-9mycqc">
      <p class="leafygreen-ui-1kp3ins">
       You can't configure the threshold that
       <a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-pipeline-pipe.-sample" target="_self">
        <span>
         <code class="leafygreen-ui-1l06pbn">
          $sample
         </code>
        </span>
       </a>
       uses to
determine when to scan the entire collection. The thresholds is 5%.
If the size is greater than 5% of the total number of documents in
the collection,
       <a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-pipeline-pipe.-sample" target="_self">
        <span>
         <code class="leafygreen-ui-1l06pbn">
          $sample
         </code>
        </span>
       </a>
       performs a
       <a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.sort/#std-label-sort-limit-results">
        top-k
       </a>
       sort by a generated random value.
The top-k sort could spill to disk if the sample documents are
larger than 100MB.
      </p>
     </div>
    </div>
   </li>
   <li class="leafygreen-ui-d7p7b6">
    <p class="leafygreen-ui-1kp3ins">
     The collection contains more than 100 documents.
    </p>
   </li>
  </ul>
  <p class="leafygreen-ui-1kp3ins">
   If any of the previous conditions are false,
   <a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-pipeline-pipe.-sample" target="_self">
    <span>
     <code class="leafygreen-ui-1l06pbn">
      $sample
     </code>
     :
    </span>
   </a>
  </p>
  <ul class="leafygreen-ui-rioki0">
   <li class="leafygreen-ui-d7p7b6">
    <p class="leafygreen-ui-1kp3ins">
     Reads all documents that are output from a preceding aggregation
stage or a collection scan.
    </p>
   </li>
   <li class="leafygreen-ui-d7p7b6">
    <p class="leafygreen-ui-1kp3ins">
     Performs a random sort to select
     <code class="leafygreen-ui-1l06pbn">
      N
     </code>
     documents. Random sorts are
subject to the
     <a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sort/#std-label-sort-memory-limit">
      sort memory restrictions
      <!-- -->
      .
     </a>
    </p>
    <div class="leafygreen-ui-15mdk4" role="note">
     <h2 class="leafygreen-ui-6n7b7d">
      Note
     </h2>
     <div class="leafygreen-ui-9mycqc">
      <p class="leafygreen-ui-1kp3ins">
       <a class="leafygreen-ui-tqgtui" href="/docs/manual/core/views/#std-label-views-landing-page">
        Views
       </a>
       are the result of aggregation
pipelines. When you use
       <code class="leafygreen-ui-1l06pbn">
        $sample
       </code>
       on a view, MongoDB appends the stage
to the end of the view's aggregation pipeline syntax. Therefore, the
       <code class="leafygreen-ui-1l06pbn">
        $sample
       </code>
       stage on a view is never the first stage and always
results in a collection scan.
      </p>
     </div>
    </div>
   </li>
  </ul>
  <p class="leafygreen-ui-1kp3ins">
   If you use
   <code class="leafygreen-ui-1l06pbn">
    $sample
   </code>
   in a
   <a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-sharded-cluster">
    sharded cluster
   </a>
   , each shard performs
the sample operation independently.
   <a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
    <code class="leafygreen-ui-1l06pbn">
     mongos
    </code>
   </a>
   samples
the merged result of each shard's sample operation and returns the
requested number of documents.
  </p>
 </section>
 <section>
  <h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
   Example
   <a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
    <svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
     <path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
     </path>
     <path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
     </path>
    </svg>
    <div class="css-1btu0w3 evvkmar0" id="example">
    </div>
   </a>
  </h2>
  <p class="leafygreen-ui-1kp3ins">
   This section shows an aggregation pipeline example that uses the
following
   <code class="leafygreen-ui-1l06pbn">
    users
   </code>
   collection:
  </p>
  <script class="structured_data" type="application/ld+json">
   {"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.users.insertMany( [\n   { _id : 1, name : \"dave123\", q1 : true, q2 : true },\n   { _id : 2, name : \"dave2\", q1 : false, q2 : false  },\n   { _id : 3, name : \"ahn\", q1 : true, q2 : true  },\n   { _id : 4, name : \"li\", q1 : true, q2 : false  },\n   { _id : 5, name : \"annT\", q1 : false, q2 : true  },\n   { _id : 6, name : \"li\", q1 : true, q2 : true  },\n   { _id : 7, name : \"ty\", q1 : false, q2 : true  }\n] )","programmingLanguage":"JavaScript"}
  </script>
  <div class="css-16lmvu9">
   <div class="leafygreen-ui-196mwvg">
    <div class="leafygreen-ui-yzcs8i">
     <pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">users</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx">   <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">1</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"dave123"</span>, <!-- -->q1 <!-- -->: <span class="lg-highlight-literal">true</span>, <!-- -->q2 <!-- -->: <span class="lg-highlight-literal">true</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">   <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">2</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"dave2"</span>, <!-- -->q1 <!-- -->: <span class="lg-highlight-literal">false</span>, <!-- -->q2 <!-- -->: <span class="lg-highlight-literal">false</span>  }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">   <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">3</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"ahn"</span>, <!-- -->q1 <!-- -->: <span class="lg-highlight-literal">true</span>, <!-- -->q2 <!-- -->: <span class="lg-highlight-literal">true</span>  }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">   <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">4</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"li"</span>, <!-- -->q1 <!-- -->: <span class="lg-highlight-literal">true</span>, <!-- -->q2 <!-- -->: <span class="lg-highlight-literal">false</span>  }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">   <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">5</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"annT"</span>, <!-- -->q1 <!-- -->: <span class="lg-highlight-literal">false</span>, <!-- -->q2 <!-- -->: <span class="lg-highlight-literal">true</span>  }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">   <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">6</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"li"</span>, <!-- -->q1 <!-- -->: <span class="lg-highlight-literal">true</span>, <!-- -->q2 <!-- -->: <span class="lg-highlight-literal">true</span>  }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">   <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">7</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"ty"</span>, <!-- -->q1 <!-- -->: <span class="lg-highlight-literal">false</span>, <!-- -->q2 <!-- -->: <span class="lg-highlight-literal">true</span>  }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
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       <div class="leafygreen-ui-xhlipt">
        <svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
         <path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
         </path>
        </svg>
       </div>
      </button>
     </div>
    </div>
   </div>
  </div>
  <p class="leafygreen-ui-1kp3ins">
   The following aggregation operation randomly selects
   <code class="leafygreen-ui-1l06pbn">
    3
   </code>
   documents from the
collection:
  </p>
  <script class="structured_data" type="application/ld+json">
   {"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.users.aggregate(\n   [ { $sample: { size: 3 } } ]\n)","programmingLanguage":"JavaScript"}
  </script>
  <div class="css-16lmvu9">
   <div class="leafygreen-ui-196mwvg">
    <div class="leafygreen-ui-yzcs8i">
     <pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">users</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx">   <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$sample</span>: <!-- -->{ <span class="lg-highlight-attr">size</span>: <span class="lg-highlight-number">3</span> } } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
     <div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
      <button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
       <div class="leafygreen-ui-xhlipt">
        <svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
         <path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
         </path>
        </svg>
       </div>
      </button>
     </div>
    </div>
   </div>
  </div>
  <p class="leafygreen-ui-1kp3ins">
   The operation returns three random documents.
  </p>
  <div class="leafygreen-ui-13vw3ie" role="note">
   <h2 class="leafygreen-ui-1fn4p2b">
    Tip
   </h2>
   <h3 class="leafygreen-ui-144d5kf">
    <strong>
     See also:
    </strong>
   </h3>
   <div class="leafygreen-ui-9mycqc">
    <p class="leafygreen-ui-1kp3ins">
     <a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/rand/#mongodb-expression-exp.-rand">
      <code class="leafygreen-ui-1l06pbn">
       $rand (aggregation)
      </code>
     </a>
    </p>
   </div>
  </div>
 </section>
</section>
