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Like to know what is the best way to load huge data every week come from different resources.

1: Huge data
2: Load into one OR multiple tables
3: Data need clean up task also

Like to here from other ETL & Sr.DBA what they are doing in there databases.
Use ETL tools / build sql scripts or any other way...?

Thanks in advance
I assume that the data is coming-in as standard flat files?

I do not like the ETL tools, as you can do better if you understand shell scripting in Oracle.

To load data fast, try the Oracle SQL*Loader utility:

You can also define the incoming files as external tables, and leave them outside of Oracle:

To learn shell scripting for Oracle, see Jon Emmon's book:

"Data need clean up task also "

This is called "data scrubbing", and quite easy:
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