is there a website,or database where i can find a record of purchases that I've made in the past?

Answer 1

You can find your old bank statements and credit card statements to find anything that you purchased through those means. Anything you paid cash for is mostly anonymous and not stored.

Answer 2

No. If you made purchases through a store's website, you can get records for those particular purchases....ie if you bought something from CircuitCity.com, or apple.com you could then return to that site and find records of your past purchases. But there's no single site that would show you everything you purchased at both sites, nor show you your purchases at the physical stores, etc. Good luck.