="toctree-l1">
  <a class="reference internal" href="../01-Basics/02-querying-data.html">
   Querying &amp; Selecting
  </a>
 </li>
 <li class="toctree-l1">
  <a class="reference internal" href="../01-Basics/03-basic-stats.html">
   Basic Statistics
  </a>
 </li>
 <li class="toctree-l1">
  <a class="reference internal" href="../01-Basics/04-calculating-columns.html">
   Calculating New Columns
  </a>
 </li>
</ul>
<p aria-level="2" class="caption" role="heading">
 <span class="caption-text">
  Combining Data