Which is better: Oracle incremental update (merge) or Oracle incremental update

Hi All,
We have big data load happening from Oracle RDBMS(source) to Oracle RDBMS(target). The data is huge (in billions) and new insertions, updates will happen. I would like to understand which among
Oracle incremental update (merge) or Oracle incremental update is better and faster - for first load and subsequent incremental updates, deletes? I request you all to provide valid reasons since I need to present the same to my client
If at all Oracle incremental update (merge) is better, then why ODI needs to have Oracle incremental update IKM.
I have seen some discussions on the same topic but I have not yet got a proper response with reasons and that is why I am posting the question again
Thanks & Regards,
Sijee Sadasivan

Hi Sijee Sadasivan,
IKM SQL Control Append could be faster for the initial load. You will therefore need another interface for the initial load.
From my experience IKM Oracle Incremental Update (Merge) is faster than IKM Oracle Incremental Update for the incremental load, but I think the best thing to do is to try it on your environment. Nothing is better than a benchmark .
IKM Oracle Incremental Update is useful for Oracle RDBMS < 9i, before this syntax was introduced.
Regards,
JeromeFr

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user5969983 wrote:
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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Unni Krishnan ([email protected]):
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Subject: Re: SQL Loader or UTL_FILE , Which is better ??
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Message was edited by:
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Which is better: Oracle incremental update (merge) or Oracle incremental update

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