ode>sid integer references student(sid)</code></li>
</ul></li>
<li>If the foreign key has more than 1 column, we must use a table constraint
<ul>
<li>specified after all columns in the <code>create table</code> statement</li>
<li><code>foreign key(eid, sid) references enrollment(eid, sid)</code></li>
</ul></li>
</ul>
<h3 id="fk-constraints-policy">FK Constraints Policy</h3>
<ul>
<li>When we insert a new row in a table with a foreign key, the value we specify for the foreign key column(s) must exists in the 