$sql=mysql_query("SELECT `date`,`status` FROM `work_date` WHERE `worker`='1' AND `date`>='2013-02-01' AND `date`<'2013-03-01'");
if (mysql_num_rows($sql))
{
	echo '<table><tr><td>Дата</td><td>Статус</td></tr>';
	while($sql_i=mysql_fetch_assoc($sql))
	{
		echo '<tr><td>'.$sql_i['date'].'</td><td>'.$sql_i['status'].'</td></tr>';
	}
	echo '</table>';
}
else echo 'Нет записей!';

CREATE TABLE IF NOT EXISTS `work_date` (
  `id` mediumint(9) NOT NULL AUTO_INCREMENT,
  `worker` tinyint(4) NOT NULL,
  `date` date NOT NULL,
  `status` enum('p','o') NOT NULL DEFAULT 'p',
  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=9 ;

--
-- Дамп данных таблицы `work_date`
--

INSERT INTO `work_date` (`id`, `worker`, `date`, `status`) VALUES
(1, 1, '2013-02-01', 'p'),
(2, 1, '2013-02-02', 'p'),
(3, 1, '2013-02-07', 'o'),
(4, 1, '2013-02-09', 'p'),
(5, 1, '2012-01-29', 'p'),
(6, 1, '2012-01-31', 'o'),
(7, 2, '2013-02-20', 'p'),
(8, 2, '2013-02-27', 'o');