How do I delete itunes store purchase history?

I really need to figure out how to delete items from my purchase history on the iTunes store. PLEASE tell me if you know how I can do this.|||I actually don't think you can. It's part of Apple's record-keeping so if you ever needed to query a purchase you made, then Apple can refer to your purchase history. Unless of course you delete your iTunes Store account, then that will get rid of it.