moving datafiles

Hi,

Can anyone tell me if there is a way to update the Oracle fixed tables to change the name of a datafile? I can't find the real underlying table where these names are kept, and even if I knew where it was, I wouldn't know how to update it directly.

To clarify, let's say I want to move /oradata1/name01.dbf

                                                 to /oradata01/name01.dbf

I know I need to recreate the control files, but how can I update the system DDL?

TIA, Brenda

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