public function delete_many()
        {
            // Build and return the full DELETE statement by concatenating
            // the results of calling each separate builder method.
            $query = $this->_joinIfNotEmpty(" ", array(
                "DELETE FROM",
                $this->_quoteIdentifier($this->_table_name),
                $this->_buildWhere(),
            ));

            return self::_execute($query, $this->_values, $this->_connection_name);
        }