ertion support at all</li>
</ul>
<h2 id="triggers">Triggers</h2>
<ul>
<li>Triggers are used in active databases</li>
<li>They are similar to <em>events</em> in an <em>event-driven architecture</em></li>
<li>A trigger usually executes a function on some specific event or events</li>
<li>The function it executes is similar to an event handler
<ul>
<li>for example, in an HTML page, you can associate a JavaScript function to an <code>onclick</code> event on a button
<ul>
<li><code>&lt;button onclick="do_somethi