Found Difference between 9i & 10g order by result

Question

Hello Guru's
I have created following table in both 9i and 10g
test1 with Columns as below
A VARCHAR2(10)
B NUMBER
Inserted 2 records in 9i and 10g ( same data)
*9i Result:*
SELECT * FROM test1;
A B
2 1
2 2
*10g result:*
SELECT * FROM test1;
A B
2 1
2 2
But if I use order by clause getting different result.
*9i Result:*
SELECT * FROM test1 order by a;
A B
2 1
2 2
*10g result:*
SQL> select * from test1 order by a;
A B
2 2
2 1
Please help about this output mismatch for same query in 9i and 10g.
Thanks In Advance.
Sandeep.

Answer 1

What is your exact oracle version?
It seems that your theory is true at least in these version - (Strange....)
In, 9i ->
satyaki9i>
satyaki9i>select * from v$version;
BANNER
Oracle9i Enterprise Edition Release 9.2.0.1.0 - 64bit Production
PL/SQL Release 9.2.0.1.0 - Production
CORE    9.2.0.1.0       Production
TNS for HPUX: Version 9.2.0.1.0 - Production
NLSRTL Version 9.2.0.1.0 - Production
Elapsed: 00:00:00.00
satyaki9i>
satyaki9i>
satyaki9i>create table strange
  2   (
  3     a    number,
  4     b    number
  5   );
Table created.
Elapsed: 00:00:00.00
satyaki9i>
satyaki9i>insert into strange values(&a,&b);
Enter value for a: 2
Enter value for b: 1
old   1: insert into strange values(&a,&b)
new   1: insert into strange values(2,1)
1 row created.
Elapsed: 00:00:00.00
satyaki9i>/
Enter value for a: 2
Enter value for b: 2
old   1: insert into strange values(&a,&b)
new   1: insert into strange values(2,2)
1 row created.
Elapsed: 00:00:00.00
satyaki9i>
satyaki9i>commit;
Commit complete.
Elapsed: 00:00:00.00
satyaki9i>
satyaki9i>SELECT * FROM strange;
         A          B
         2          1
         2          2
Elapsed: 00:00:00.00
satyaki9i>
satyaki9i>SELECT * FROM strange order by a;
         A          B
         2          1
         2          2
Elapsed: 00:00:00.00
satyaki9i>
satyaki9i>In 10g,
satyaki10g>
satyaki10g>select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for Linux: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
Elapsed: 00:00:00.03
satyaki10g>
satyaki10g>
satyaki10g>
satyaki10g>create table strange
  2   (
  3     a    number,
  4     b    number
  5   );
Table created.
Elapsed: 00:00:00.05
satyaki10g>
satyaki10g>insert into strange values(&a,&b);
Enter value for a: 2
Enter value for b: 1
old   1: insert into strange values(&a,&b)
new   1: insert into strange values(2,1)
1 row created.
Elapsed: 00:00:00.00
satyaki10g>
satyaki10g>/
Enter value for a: 2
Enter value for b: 2
old   1: insert into strange values(&a,&b)
new   1: insert into strange values(2,2)
1 row created.
Elapsed: 00:00:00.00
satyaki10g>
satyaki10g>commit;
Commit complete.
Elapsed: 00:00:00.00
satyaki10g>
satyaki10g>SELECT * FROM strange;
         A          B
         2          1
         2          2
Elapsed: 00:00:00.00
satyaki10g>
satyaki10g>SELECT * FROM strange order by a;
         A          B
         2          2
         2          1
Elapsed: 00:00:00.00
satyaki10g>
satyaki10g>Let me go through the docs.
Regards.
Satyaki De.