ss="example-contents"><p>
    Suppose you are storing web server access logs in a database.
    Most accesses originate from the IP address range of your organization but
    some are from elsewhere (say, employees on dial-up connections).
    If your searches by IP are primarily for outside accesses,
    you probably do not need to index the IP range that corresponds to your
    organization's subnet.
   </p><p>
    Assume a table like this:
</p><pre class="programlisting">
CREATE TABLE access_log (
    ur