Oracel SQL Query
Collect a certain time intervatal data

I'm looking for queries to collect a certain time interval data from my table.
Here is current the data in my table and as you can see, the data is set with every 5 minute.

Time Load
06/14/2011 17:45:00 2,560
06/14/2011 17:50:00 2,422
06/14/2011 17:55:00 2,348
06/14/2011 18:00:00 2,765...