[RESOLVED] (+) in Sql

[fofa4ever]

Good Day;

I've a simple question :

What the (+) is using for ?

select * from edge.CLIENT C, edge.SOURCE S,EDGE.AGING_OFF E
where c.salesman_code = s.source_code (+) and
C.cust_id = E.ldg_id and
E.ldg_type = C.supp_yn and
E.CREATION_DATE BETWEEN '1-MAY-2011' AND '2-MAY-2011'

Thank you