ng()"&gt;Do something&lt;/button&gt;</code></li>
</ul></li>
</ul></li>
<li>Triggers follow the <em>ECA structure</em> to define <em>active rules</em>
<ul>
<li><strong>E</strong>vent: signal (trigger) invoking the rule</li>
<li><strong>C</strong>ondition: logical test, determines if the action will be carried out or not</li>
<li><strong>A</strong>ction: code or function (in SQL, PL/SQL, or some other supported language) running on the DB</li>
</ul></li>
<li>Trigger support varies across DBMSs</li>
</ul>
<h3 