If you've ever had to do time oriented joins, or even just store a bunch of time oriented data, you would know the answer to this question. Timestamp keys are i

If you've ever had to do time oriented joins, or even just store a bunch of time oriented data, you would know the answer to this question. Timestamp keys are important. Storing the data in a structure that makes sense for a time series is important. The ability to construct verbs which make sense is important.