Problem with ordering in select query.

Hi,
We have the following query:
SELECT s.surveyid, m.messageid, m.text FROM MS_SURVEY s, MS_MESSAGES m where (m.messageid=s.survey_desc or m.messageid=s.survey_heading or m.messageid=s.user_profiles) and s.surveyid=xxx
This query selects 3 rows, one for description, one for heading and one for user profiles.
The problem is that, we have 4 databases. 2 Oracle 8.1.5, one Oracle 8.1.6 and one 8.1.7
This query when run on 8.1.7 and 8.1.5 will give us the result in the order:
1...description
2...heading
3...user profile
But, when run on 8.1.6 (which is the client setup of oracle)
The result is in the order:
1...user profile
2...heading
3...description
This project has still not been delivered because of this problem and we are already late by 2 months.
Please somebody let me know why this is happening?
I cannot change the code...as it has been tested for 1 month on staging setup, where it is working fine.
I have no clue as to why this is happening on the Client setup ONLY.
Is it a problem of different oracle versions, or any client side db trigger is there, or any options which the client has selected during his/her db installation or whatever...?
Kindly help.
Thank you.
Regards,
- Ram

Your query has no ORDER BY clause. Oracle does not guarantee (nor does any other RDB that I know of) to return rows in any particular order in the absence of an ORDER BY.
There are many factors that could affect the order in which rows will be returned in the absence of an eplicit ORDER BY clause. Among these are things like order of insertion of rows, access path chosen by the optimizer, the shoe size of the requestor.
You are going to have to change your code if you want a guaranteed order of the records.
TTFN
John

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The table is having approximately 70 million rows.
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[http://www.megagaleria.com/pictures/Pic_10074_25.jpg]
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http://deneskubicek.blogspot.com/
http://htmldb.oracle.com/pls/otn/f?p=31517:1
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Problem with ordering in select query.

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