BerkeleyDB_KeyRange.htm">KeyRange</a></td><td><div class="summary">
        <p>
            A class representing an estimate of the proportion of keys that are less
            than, equal to, and greater than a given key.
            </p>
        <p>
            Values are in the range of 0 to 1; for example, if the field less is
            0.05, 5% of the keys in the database are less than the key parameter.
            The value for equal will be zero if there is no matching key, and will
            be