How to join to a column contains trailing spaces

Question

I am trying to do a Left Outer Join between the above 2 tables.
select a.name, a.address, a.city, a.state, a.zip, nvl(b.zip_id,0) as zip_id
from t1 a, t2 b
where a.zip = b.zip(+)
The problem is that t2.zip is of 9 character size values with 5 digit zip code and 4 trailing spaces where as t1.zip is just 5 characters. Could any one advice me
on how to make this Join?
Thanks in advance.

Answer 1

Thanks for all your replies. The query work fine if it is an inner join. But when I try it as a left outer join it says missing expression.
select a.zip, b.zip, trim(zip_id) as zip_id
from t1 a, t2 b
where a.zip = substr(b.zip, 1, 5)(+)
create table t1 (zip varchar2(9));
insert into t1 values('17602');
insert into t1 values('20879');
insert into t1 values('21048');
insert into t1 values('21074');
insert into t1 values('21157');
insert into t1 values('21158');
insert into t1 values('21227');
insert into t1 values('21228');
insert into t1 values('21776');
insert into t1 values('21787');
insert into t1 values('21791');
insert into t1 values('21797');
create table t2 (zip varchar2(9), zip_id varhcar2(9));
insert into t2 values('21048 ','8813');
insert into t2 values('21074 ','8827');
insert into t2 values('17602 ','7193');
insert into t2 values('21150 ','8864');
insert into t2 values('21152 ','8865');
insert into t2 values('21153 ','8866');
insert into t2 values('21154 ','8867');
insert into t2 values('21155 ','8868');
insert into t2 values('21156 ','8869');
insert into t2 values('21157 ','8870');
insert into t2 values('21158 ','8871');