if you set the control file to monitor history 5.24, you can check trx history for type ord-po. It shows new orders and changed orders. Details are in the help in 5.24 field: Keep Booking History poc_po_hist.

Hi Raymond,

Thanks for your reply. tr_hist may show 'ord-po' transactions but my intension is to check the rqd_det, pod_det etc table. Is there any way to check data increments/updates by date to these tables ? I like to know if there is any field where this data is stored.

PO control file 5.24 "Keep Booking History". It keeps new po's and change history. Please check the help on the field for more detail (or the manuals). Keep in mind that the history files may become quite big!