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I need to find credit card numbers hidden in text columns, using Oracle 11g and SQLPlus

partyon asked
Last Modified: 2015-02-08
During an audit it was discovered that users where hiding customers credit card info in text columns like a description or notes column vs. where it belongs. We can't filter it on the front-end because it's 3rd party software and we are unable to make changes and the vender refuses to make changes based on our needs.
So I need to use some SQL commands to scan columns for matches. Been looking at the REGEXP_SUBSTR commands but I have to write something that will scan all the columns in a particular schema with applying the expression.

Has anyone accomplished this task already ? If so any direction or examples are greatly appreciated.
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