As John mentioned, you could try using Compare Data and/or Schema Compare, and with that you might look at using Automation Designer to automate the tasks if you find those work for you (there's a ton of documentation on Automation Designer on Toad World and in the Help). On a side note, there's really not much to suggest here, since we don't know exactly what you want to compare, and how much data you are talking about comparing, etc. Generally speaking tho, I always found it easiest to keep a record of the changes in the actually conversion program (in your case an ETL program). What I've always done is make log files/tables during these types of programs, that way if you ever want to know what changed, then you have it all in one place. Granted, it requires more effort to program it to do this and make sure exceptions are handled properly, but it's the cleanest and easiest way to know exactly what happened during a process. I would always record how many records were read, how many records were updated/inserted, reported exceptions, etc. Then if anyone ever asks what changed, you just refer to the log and your done.
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