SQL時間段查詢

WHERE `updateTime`>='2011-07-07 9:00:00' AND `updateTime`< DATE_ADD('2011-07-07 9:00:00', INTERVAL +1 HOUR)

WHERE (UNIX_TIMESTAMP(`updateTime`) - UNIX_TIMESTAMP('2011-07-07 9:00:00')  <= 3600) and (UNIX_TIMESTAMP(`updateTime`) - UNIX_TIMESTAMP('2011-07-07 9:00:00') >=0)

兩種SQL的時間段查詢方法。