 unless you intend them
         to be applied equally to all child tables.  There is no point in
         defining any indexes or unique constraints on it, either.  For our
         example, the root table is the <code class="structname">measurement</code>
         table as originally defined:

</p><pre class="programlisting">
CREATE TABLE measurement (
    city_id         int not null,
    logdate         date not null,
    peaktemp        int,
    unitsales       int
);
</pre><p>
        </p></li><li cla