Multiple values.

Question

I have an existing query that pulls data from many tables. One of the fields in the WHERE Clause is sometimes null causing data to not be returned. when I take the clause out it returns multiple rows of data for the same person. I have tired using an Outer Join but that does nothing for the problem I have also tried
AND (Table1.PERSON_ID = Table2.person_id OR Table2.person_id IS NULL)
with no results
The original line is:
AND Table1.PERSON_ID = Table2.person_id
Any help would be appreciated.

Answer 1

Hi,
I have tired using an Outer Join but that does nothing for the problem I have also triedWhat do you mean, why not?
SQL> with t1 as (select 1 x, 11 y from dual union all
            select 2 x, 12 y from dual union all
            select 3 x, 13 y from dual)
,    t2 as (select 100 z, 11 y from dual union all
            select 200 z, 12 y from dual union all
            select 300 z, null y from dual)
select t1.*, t2.z from t2,t1
where t1.y = t2.y(+)
         X          Y          Z
         1         11        100
         2         12        200
         3         13          
3 rows selected.Is it because you are looking for the "missing" Z value?
Regards
Peter