Fetch only new or updated data from Last run

Content

Hi All,

I am very new to Reporting hence need help to devlop report to fetch only incremental data.

Report Logic:

1) Report will be called by Webservice by passing parameters.

2) Report will fetch data from tabel inv_material_txns and pass Work Order number to wie_work_orders_b to fetch Work order & Work order type.

I have created basic SQL to fetch data. But I am not able to figure out how to fetch only incremental data from last RUN. i.e report should fetch only data that is new;y created or updated since last run of this report.