My own commandline FU

Shell

# changes the ownership for a particular user
# I use it mainly in cases the uid/gid differs between machines while it was intended
# to be the same 

find /oracle -uid 500 -exec chown oracle {} \;
find /oracle -gid 500 -exec chgrp oracle {} \;

OT: Commandline Fu (external link)

This is not exactly bound with the Oracle RDBMS, but I am impressed by cleverness and flexibility of those oneliners - http://www.commandlinefu.com/commands/browse