>I doubt Target was storing the data This is a company that loves to try and predict customer behaviours by using massive data-mining techniques. I would be su

>I doubt Target was storing the data This is a company that loves to try and predict customer behaviours by using massive data-mining techniques. I would be surprised if they didn't store any and all data they get their hands on, especially if it could be used as an additional table key. For background, I recommend this article, which is one of the most interesting works I've seen in the last ~decade: http://www.nytimes.com/2012/02/19/magazine/shopping-habits.html?_r=1&pagewanted=all http://www.nytimes.com/2012/02/19/magazine/shopping-habits.h...