How to filter content of resultset in java

I have a scenario like this :
I have a website that users send range of date for example 2013-01-01 to 2013-01-04 and then I need to get some information from the database for each day in a range for example in the above scenario I have to send request to database 3 times:

2013-01-01 to 2013-01-02,2013-01-02 to 2013-01-03,2013-01-03 to 2013-01-04

so as you can see if I want to extract for a month then this would take so long. A better and faster Idea is to call database once and extract all information , for example this range 2013-01-01 to 2013-01-04, all at once and filter information according to each day in java.

Is there anyway that I can do that in java with the help of result set? I appreciate also if anyone has a better idea to handle this scenario ?

Update :

Here is the query that I am using :

SELECT enID, sum(frequency) from entity-epoch
WHERE dateID IN(
    SELECT dateid
    WHERE startdate>=2013-01-01 AND enddate<=2013-01-02)
GROUP BY sum(frequency)

and I have a loop thatcall it for each day?(instead of thoes dates above that I put for better readability I have ? and feed it with different dates.

Solution

A better idea still is to only fetch the data you actually want to process, via a suitable WHERE clause.