d</span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co">## Regular BTREE index on multiple columns</span></span></span>
<span class="r-in"><span><span class="fu">dbIndex</span><span class="op">(</span><span class="va">conn</span>, name <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">"sch"</span>, <span class="st">"tbl"</span><span class="op">)</span>, colname <spa