Oracle-L: New member / outer join problem

From: <attila.mosolygo_at_GARANCIA.HU>
Date: Thu, 06 Nov 2003 04:04:38 -0800
Message-ID: <F001.005D5D3A.20031106040438@fatcity.com>

Hi All,

I'm a new member on this list. I'm not too familiar with ORA, but I have some experience in other RDBMS's.

I had run into the following problem.
My task is to write a query, which returns with an empty (full of NULLs) row, if the condition is false.

I'm thinking in outer joins.

I made a test. It returns all the matching rows (if there are such rows), but unfortunately returns with no row, if the condition is false. Could someone help me, what could be the problem? My oppinion is that it must be work fine... :-)

I use Oracle9i Enterprise Edition Release 9.2.0.1.0 .

My test is here:

create table ATTILA_1 (m1 varchar2(10));

insert into attila_1 values('a');
insert into attila_1 values('a');
insert into attila_1 values('b');

SELECT
b.*
FROM
dual left outer JOIN ATTILA_1 b

ON (b.m1='c');

It returns correctly (with 2 or 1 rows) if the string in the condition is 'a' or 'b', but returns with no row (I'd like to see one row, with full of NULLs) if I call it with 'c'... :-(

Could you tell me, why is this? Or any idea to solve this task?

Thanks in advance:
Attila
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Author: <attila.mosolygo_at_GARANCIA.HU
INET: attila.mosolygo_at_GARANCIA.HU

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