Help in this sql

Hi I have a sql and output like this

select
b.LIC_NO,TO_CHAR(a.ro_dtime,'YYYY') RO_DTIME,A.RO_NO
from MSS_RO_HDR a, Mss_V_car_records b
WHERE a.ro_dtime between '01-JAN-2000' AND '01-JAN-2007'
AND a.CARD_ID=b.ID
GROUP BY b.LIC_NO,TO_CHAR(A.RO_DTIME,'YYYY'),a.ro_no;

My current output is like this

LIC_NO RO_DTIME RO_NO
GW9896T 2004 RA0044874
GW9896T 2004 RA0047489
GW9896T 2005 RA0056049
GW9896T 2005 RA0056216
GW9896T 2006 RA0066809
GW9896T 2006 RA0069883
GY694H 2004 RA0053667
GY694H 2004 RA0053799
GY694H 2005 RA0054237
GY694H 2005 RA0054571
GY694H 2006 RA0071338
GY694H 2006 RA0079215

My required Output is like this:

LIC_NO 2004 2005 2006
GW9896T RA0044874,RA0047489 RA0056049,RA0056216 RA0066809,RA0069883
GY694H RA0053667,RA0053799 RA0054237,RA0054571 RA0071338,RA0079215

Kumar instead of showing required output, You can specify I need LIC_no,year and so on.. for particular user/all user something like that so that all can understand your actual need.

This is called PIVOTING and is generally bad situation.
Even if you manage to make such query (there are several ideas, more or less successful) it will be extremely hard then to process the data ( to format, aggregate etc)

Maybe it's better to get the data as they are, and let the application interface to format them as needed