View with outer join results wrong number of rows

Question

Hi,
When i run a query on a view it returns 2 rows(2 distinct rows), when i run the same query with the select statement which the view is created , it returns only 1 row. According to data the 1 row result is correct, how come twi results. A coding sample as follows. Any help is most appreciated.
I have a view created based on a outer join of two views in the format;
create or replace view view1 as
select ord.order_no order_no,
ord.del_type del_type,
det.qty qty
from detail_view det, order_view ord
where det.site(+) = ord.site
and det.part(+) = ord.part
and nvl(ord.del_type,'_NULL_') <> 'F'
with read only;
detail_view & order_view themselves have several group by/sum and union Alls.
When i run the query on this view
[Select * from View1 where order_no = 'A30' And del_type = 'B']
it returns 2 distinct rows. But when i run the select statement which created the View1 with the query it returns only one row!!
What did i do wrong?
Thanks
Sanjeewa

Answer 1

I cannot reproduce this :
SCOTT@LSC01> create table detail_view(qty number,site number,part number);
Table created.
SCOTT@LSC01> create table order_view(order_no varchar2(10), del_type varchar2(1), site number,part number);
Table created.
SCOTT@LSC01>
SCOTT@LSC01> create or replace view view1 as
  2  select ord.order_no order_no,
  3  ord.del_type del_type,
  4  det.qty qty
  5  from detail_view det, order_view ord
  6  where det.site(+) = ord.site
  7  and det.part(+) = ord.part
  8  and nvl(ord.del_type,'_NULL_') <> 'F'
  9  with read only;
View created.
SCOTT@LSC01>
SCOTT@LSC01> insert into order_view values ('A30','B',1,2);
1 row created.
SCOTT@LSC01> insert into order_view values ('A30','B',1,2);
1 row created.
SCOTT@LSC01>
SCOTT@LSC01> Select * from View1 where order_no = 'A30' And del_type = 'B';
ORDER_NO   D        QTY
A30        B
A30        B
SCOTT@LSC01>
SCOTT@LSC01> select ord.order_no order_no,
  2  ord.del_type del_type,
  3  det.qty qty
  4  from detail_view det, order_view ord
  5  where det.site(+) = ord.site
  6  and det.part(+) = ord.part
  7  and nvl(ord.del_type,'_NULL_') <> 'F' ;
ORDER_NO   D        QTY
A30        B
A30        Bwhat is your version?