JDeveloper, Java & XML :: Convert Some Of The Rows Into Columns Query

CREATE TABLE CFL (q_id Number(18),per_id number(18),PERIOD VARCHAR2(15 CHAR), AMOUNT NUMBER);

INSERT INTO CFL VALUES (11, 1, 'JAN-10', 10);
INSERT INTO CFL VALUES (21, 1, 'FEB-10', 20);
INSERT INTO CFL VALUES (31, 1, 'MAR-10', 10);
and so on (12 records for a year with same quota_id, e.g. here it is 1)
[code].......

Also this column values period is dynamic.. it can be for any year.

The select will return values like

Select per_id, PERIOD, amount from cfl
where quota_id = 1

Basically 12 rows will be the output:
per_id period amount
1 JAN-10 10
1 FEB-10 20
1 MAR-10 10
..............and so on

1 DEC-10 10

The result output should be:

Per_id JAN-10 FEB-10 MAR-10.............DEC-10
1 10 20 10................10