SQL & PL/SQL :: Concat Column Values

Table creation

SQL> create table concat_test (
2 empno varchar(10),
3 empname varchar (10),
4 description varchar(50) )
5 /

Inserts are

insert all
into concat_test (empno,empname,description) values ('1','pratik','want')
into concat_test (empno,empname,description) values ('1','pratik','to')
into concat_test (empno,empname,description) values ('1','pratik','concat')
select * from dual;

I want the o/p as

Empno empname description
1 Pratik want to concat