The interesting part about timestamping change to records is essentially "effective dating" and it is bread and butter in any transactional system that needs to

The interesting part about timestamping change to records is essentially "effective dating" and it is bread and butter in any transactional system that needs to record employee info. This is done varying degrees to columnar values or entire rows themselves. In an RDBMS, you will create a compound key to allow you to know the history and the current record. I guess the new fangled NoSQL will make it easier to store it easily..?