Oracle 10G gives in sorted order without order by ,in 11g it is not.

we are facing a strange problem.
we have M Views on which we perform select operation ,we put joins of M Views and get the results by select operation , the results was in sorted order (asc) and we were not using any order by clause in the select query , this was in oracle 10G.
The compelte schema where these M views are and also the underneath tables are now migrated to oracle 11g using import/export option.
Now the queries which was giving the result set in sorted order (asc), are not given the result set in sorted order anymore. it is in different order but I think at always return the same order not asc or desc but an specific random order .
we can not change the query as of now as there are 1000+ and each query would require a order by statement .
Do we have any parameters which can be change , so that we can force oracle to use a different plan so that it gives result in order ?
the select queries are very simple ones not complicated no extra function or group by is used in most of the queries.
Please suggest possible solutions . Thanks much.

Su**** wrote:
Please guide me how to go to this doc link ,i am newbi, and do not how to go to this link.
MOS Doc 345048.1 ('Group By' Does Not Guarantee a Sort Without Order By Clause In 10g and Above)
Go to http://support.oracle.com, log in to My Oracle Support, and search for 345048.1 If you don't have a My Oracle Support account, you'll need to contact whoever manages your company's Oracle support and ask them to create an account for you.
Basically, no version of Oracle has ever guaranteed the order of results if you don't specify an ORDER BY clause. In 10g, the only algorithm that was available to implement a GROUP BY happened to sort the results as a side effect. 11g introduced a new algorithm for grouping results that is more efficient and does not have the side effect of ordering the results. Most likely, your query plans have changed to use the more efficient grouping algorithm.
If you want the results to be sorted, you should add an appropriate ORDER BY clause. If you go through the MOS document, there will also be suggestions for ways that you can disable the new grouping algorithm though I would not recommend that.
Justin

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Oracle 10g group by sorting

Hello friends
Pls refere to my previous thread where we have discussed on sorting oprtion of Adding order by whereever group by is applicable
ORACLE 10G group by sorting Suggestion rqd
Read?
Then come to my point
if there is multiple columns for the group by then if we want to include order by clause, same number of columns has to be included in the order by also.
i dont think it is so
example'
SELECT SUM(QTY1),SUM(QTY2), PARTNO, PART_DESC
from part_sen
group by partno, part_desc
order by partno, part_desc
qty1 qty2 partno partdesc
70     101     I001     BRAKE SHOE
56     54     I002     HORN
30     30     I003     GEAR
15     5     I004     DOOR
5     5     I007     MOTOR GEAR
10     15     I008     ANCILLARY
10     15     I009     Window
so in order by clause we can include only the first column.. that is partno
SELECT SUM(QTY1),SUM(QTY2), PARTNO, PART_DESC
from part_sen
group by partno, part_desc
order by partno
Same result i get.
Pls give your suggestion
s

ALex,
SELECT SUM(QTY1),SUM(QTY2), PARTNO, PART_DESC
from part_sen
group by partno, part_desc
70     101     I001     BRAKE SHOE
56     54     I002     HORN
30     30     I003     GEAR
15     5     I004     DOOR
5     5     I007     MOTOR GEAR
10     15     I008     ZLLADER
10     15     I008     OCTLADER
10     15     I008     ANCILLARY
10     15     I008     BALLLADER
10     15     I009     Window
SELECT SUM(QTY1),SUM(QTY2), PARTNO, PART_DESC
from part_sen
group by partno, part_desc
order by partno
70     101     I001     BRAKE SHOE
56     54     I002     HORN
30     30     I003     GEAR
15     5     I004     DOOR
5     5     I007     MOTOR GEAR
10     15     I008     ANCILLARY
10     15     I008     BALLLADER
10     15     I008     OCTLADER
10     15     I008     ZLLADER
without ordering the second column part_desc it is properly ordered how?
so adding order by partno is same as order by partno,part_desc
Pls reply
S

I have installed oracle 10g in my winxp machine. i am using enterprise manager. i am not able to shutdown the system as it asks for os username and password. i have provided my os username and password but eerror persiste. somebody pls help me to get rid

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ORACLE 10G group by sorting Suggestion rqd

Hai friends,
recently we migrated from Oracle 9i to oracle 10g. We are instructed that Group by will not sort the records in Oracle 10g, so we are asked to add Order By Clause in wherever applicable in the package.
But after migration i inserted 100 records in 10g database and tested. I am getting correct sorting of records based on Group by column. Can any one explain me why it is? I heard the news sorting will difer on Oracle 10g versions. I am using Oracle Database 10g Enterprise Edition Release 10.2.0.4.0. if it automaticallly sorts, then no need to change the package for sortiing right?
Give me your valuable suggestions..
S

And here's a simple example on 10.2.0.4 that clearly shows the results are not sorted.
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CONSUMER GROUP                         2
INDEX PARTITION                      718
TABLE SUBPARTITION                    14
SEQUENCE                             228
SCHEDULE                               1
TABLE PARTITION                      301
PROCEDURE                             21
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If you need the results in order you must use an order by clause.
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Message was edited by:
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Well, there was another problem in the genclntsh script.
Under gentoo we got it fixed like this:
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user11000521 wrote:
Hi guys,
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HTH
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Edited by: Aman.... on Apr 26, 2009 9:37 AM
replaced a word with another

Oracle 10G gives in sorted order without order by ,in 11g it is not.

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