location based data storage and query.

Could you please find out how Oracle can help in location based data storage and query.

The expectations are:

1. To store location based data with longitude and latitude.
2. Query database to find out records which are within X range of radius of a certain longitude and latitude, say for example within 5KM radius.

Consider a table (MY_LOCATION) with following data:

SrNum	Latitude/Longitude
1	28.625452/ 77.218386
2	28.613925/ 77.242246
3	28.601925/ 77.273939
4	28.628579/ 77.271429
5	28.660668/ 77.271837

Now I want to query the table with something like this:

SELECT * FROM MY_LOCATION WHERE (LATITUDE IS 28.625452 WITH +5KM AND LONGITUDE IS 77.218386 WITH +5KM)

Note: The query is bracket is sudo query, I need actual sql statement to query the table.