SQL & PL/SQL :: Get Single Row From Multiple Duplicate Values Of One Field?

CREATE TABLE prim_tbl
(id NUMBER,--- id is not primary key here
description VARCHAR2(30));

INSERT ALL
INTO prim_tbl VALUES (1,'aad')
INTO prim_tbl VALUES (1,'aads')
INTO prim_tbl VALUES (2,'bb')
INTO prim_tbl VALUES (2,'cc')
INTO prim_tbl VALUES (2,'dd')
SELECT * FROM dual;

I want to select the ids only one time, i.e my output will have only two rows: one row with id as 1 and other row with id 2 whatever be the description.

desired output sample:

Quote:1, aad
2, bb

I used:
select distinct(id),description from prim_tbl;

but it did not give the required result.How can I get it??