">A</var>, <var class="var">B</var>, &hellip;)</code><a class="copiable-link" href="#index-join-1"> &para;</a></span></dt>
<dd>
<p>Combine two tables by rows using key variables, in a restricted form.
</p>
<p>This is not a &quot;real&quot; relational join operation. It has the restrictions
that:
 1) The key values in B must be unique.
 2) Every key value in A must map to a key value in B.
These are restrictions inherited from the Matlab definition of table.join.
</p>
<p>You probably don’t want to use this