Assuming you're using Cassandra 3.0 or more, User Defined Functions (UDF)
can help you to compute the shipment_delay. For the ordering, since this
column is computed and not a clustering column, ordering won't be possible
More details about UDF: http://www.doanduyhai.com/blog/?p=1876
On Mon, Oct
I have a table for tracking orders. Each order has an `ordered_at` field
(can be a timestamp, or a long with the milliseconds of the timestamp) and
`shipped_at` field (ditto, timestamp or long).
orderd_at tracks when the order was made.
shipped_at tracks when the order was shipped.
When
