Thanks a lot to all those people who replied to my query. answering stephane question : the table is 500MB+ , and there is no unique key since it is a child table. Moreover presently i cannot modify the table.
The general concensus is that there is no guarantee of return order of rows without using order by clause. Anybody knows why this is so ? Oracle must be having a fixed algorith for data access , probably using the extent map. Assuming 1. no query parallelism & no deletes/updates to table 2. no index/optimizer/structure changes the data retrieval path should not change with time for the same query ?? thanks & regards ratnesh singh -----Original Message----- Kumar Singh Sent: Tuesday, October 22, 2002 4:09 PM To: Multiple recipients of list ORACLE-L Hi I have a very large DW table in which there are only inserts and NO updates/deletes.The table grows by around 2-5 % every week due to new inserts. I need to return the rows for each customer in the same order as inserted to table.Due to design/delivery constraints , i cannot modify the table. ques 1 : if i do a 'select * from table' with where clause but no order by clause,will the Order of rows returned be the same whenever this query is executed ? Is this guaranteed by Oracle ? ques 2 : if i export/import this table , then execute the same query, will the Order of rows returned be the same as before the export/import ? ques 3 : if i use the 'move' cmd to rebuild this table , then execute my query,will the Order of rows returned be the same as before the rebuild ? any explanations are most welcome.... many thanks ratnesh singh ------------------------------------------------- Ratnesh Kumar Singh Sr. Software Engineer Patni Computer Systems Ltd TTC Mahape , Navi Mumbai Work : (91 22) 7611090/110/128/350 Ext. 2107/2106 Home : (91 22) 8662162 http://www.patni.com World-Wide Partnerships. World-Class Solutions. ------------------------------------------------- -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Ratnesh Kumar Singh INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Ratnesh Kumar Singh INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
