to</span> university;</span>
<span id="cb10-2"><a href="#cb10-2" aria-hidden="true"></a><span class="co">-- alter table course drop constraint course_code_key;</span></span>
<span id="cb10-3"><a href="#cb10-3" aria-hidden="true"></a><span class="kw">alter</span> <span class="kw">table</span> course</span>
<span id="cb10-4"><a href="#cb10-4" aria-hidden="true"></a>    <span class="kw">add</span> <span class="kw">unique</span> (code);</span></code></pre></div>
<div class="sourceCode" id="cb11"><pre class="sou