How to resolve duplicate reversal in ods and the purpouse of parallelismtab

Question

how to avoid duplicate reversal in ods and what is the use of parallelism tab in the ods that appear when we click reconstruction tab in ods manage
basically my requirement is that 
we are getting transaction data which will pass through the update rules start routine and will be updated into ods
but in ods we are getting duplicate reversal means the record with latest version should be updated ut we are getting duplicate reversal and our reveue is showing in minus

Answer 1

user13310594 wrote:
Hi,
I'm having millions of records in the table .Some duplicate values/rows are inserted in it.
I just want to delete duplicate rows but also want to retain the last duplicate row.
For eg if one record is found three times ,i want to delete first and second record and retain
the third one i.e the last inserted one.Hi Paramdeep,
To start with, since you do not wish to keep multiple rows with same values, why allow them to get inserted in the first place?
Wouldn't it be easier to block duplicate rows from inserting by creating a Unique constraint on Column(s) that define a row as duplicate, then rather deleting duplicate rows periodically?
For deleting duplicate rows, there are N number of techniques available. Always remember, you need to have a rigid criteria that marks row as duplicate.
[url http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:15258974323143]this is one recomended by tom for large tables.
Vivek L