I wrote a script to easily dump a sample size of data from each table in the Oracle databases.
If you want to search for column names matching (passw|bank|credit|card), you can enable the -idf argument. This is similar to auxillary/admin/mssql/mssql_idf module in Metasploit.
The script can be downloaded at https://github.com/milo2012/pentest_scripts/blob/master/oracle_pillage/ora_pillage.py
Please send your feedback to @keith55 or keith.lee2012[at]gmail.com.