Outer join runs differently on SQL Server and Oracle

Oracle 9i:
create table t(i integer)
Table created
insert into t values(1)
1 row inserted
select t1.i i1, t2.i i2
from t t1 left join t t2 on 1=0
0 rows selected
-- I beleive this is wrong
drop table t
Table dropped
the same query against MS SQL Server 2000:
create table t(i integer)
insert into t values(1)
select t1.i i1, t2.i i2
from t t1 left join t t2 on 1=0
i1 i2
-- --
1 NULL
-- I think this is correct
(1 row(s) affected)
drop table t
What do you thinkAK wrote:
> Oracle 9i:
> create table t(i integer)
> Table created
> insert into t values(1)
> 1 row inserted
>
> select t1.i i1, t2.i i2
> from t t1 left join t t2 on 1=0
> 0 rows selected
> -- I beleive this is wrong
> drop table t
> Table dropped
> the same query against MS SQL Server 2000:
> create table t(i integer)
> insert into t values(1)
> select t1.i i1, t2.i i2
> from t t1 left join t t2 on 1=0
> i1 i2
> -- --
> 1 NULL
> -- I think this is correct
> (1 row(s) affected)
> drop table t
> What do you think
I think you're using an unpatched release of Oracle 9i, whichever
release that may be (9i says NOTHING about which release or patch level
you're using):
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.6.0 - 64bit Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.6.0 - Production
SQL> create table t(i integer);
Table created.
SQL>
SQL> insert into t values(1);
1 row created.
SQL>
SQL>
SQL> select t1.i i1, t2.i i2
2 from t t1 left join t t2 on 1=0;
I1 I2
-- --
1
SQL>
The results look exactly the same to me between the two. Care to try
again, this time with a patched release of Oracle?
David Fitzjarrell|||AK schrieb:
> Oracle 9i:
> create table t(i integer)
> Table created
> insert into t values(1)
> 1 row inserted
>
> select t1.i i1, t2.i i2
> from t t1 left join t t2 on 1=0
> 0 rows selected
> -- I beleive this is wrong
> drop table t
> Table dropped
> the same query against MS SQL Server 2000:
> create table t(i integer)
> insert into t values(1)
> select t1.i i1, t2.i i2
> from t t1 left join t t2 on 1=0
> i1 i2
> -- --
> 1 NULL
> -- I think this is correct
> (1 row(s) affected)
> drop table t
> What do you think
>
Oracle ansi join implementation had some bugs ( much of them fixed in
recent versions/patches ), but in your case i definitely can't reproduce
your behaviour ( both on 9iR2 and 10gR1/R2)
oracle@.col-fc1-02:~/sql >sqlplus scott/tiger
SQL*Plus: Release 9.2.0.6.0 - Production on Thu Aug 11 19:19:29 2005
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.6.0 - Production
SQL> create table t(i integer);
Table created.
SQL> insert into t values(1);
1 row created.
SQL> select t1.i i1,t2.i i2
2 from t t1 left join t t2 on 1=0;
I1 I2
-- --
1
SQL>
Here is output for 10gR1
oracle@.wks01:~> sqlplus scott/tiger
SQL*Plus: Release 10.1.0.3.0 - Production on Do Aug 11 18:05:22 2005
Copyright (c) 1982, 2004, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.1.0.3.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> create table t(i integer);
Table created.
SQL> insert into t values(1);
1 row created.
SQL> select t1.i i1,t2.i i2
2 from t t1 left join t t2 on 1=0
3 /
I1 I2
-- --
1
SQL>
Best regards
Maxim|||yep, one more reason to patch up:
Connected to:
Oracle9i Release 9.2.0.1.0 - Production
JServer Release 9.2.0.1.0 - Production
Thanks for the feedback