is</li>
<li>note that sometimes, this functionality is handled by the front-end application, not the database</li>
</ul></li>
<li>Another example: we could have a <code>BEFORE DELETE</code> trigger to archive important deleted data
<ul>
<li>we could insert the deleted data in another table</li>
<li>we could also record who deleted the data, and when it was deleted</li>
</ul></li>
<li>Unfortunately, trigger implementations vary in different DBMSs
<ul>
<li>Some support only subsets of the standard, some make 