Vijay,
I don't really understand your question. In DP, you are generally not very interested in each sales order, you are interested in summary data. If you really want reporting by individual Sales Orders, you should rethink whether DP is the best tool for the job.
In some implementations I have seen, there is a Key Figure for Quantity by Request date, and another Key figure for Quantity by Commit Date. The periodicity of the Storage Bucket Profile determines how the data is aggregated in time ("bucketed").
Best Regards,
DB49