Material Master Changes in a Particular Date

Hi Experts,

We want to check, how many changes have been done in the mateiral master on certain date in certain login thru T-Code MM02 or MM17.

How Can I get a report of this.

I believe Table CDPOS and CDHDR is used to know the changes in the master, but when I am making a query, Table CDPOS can not be using as a join table.

Kindly guide me, full points for helping answers.

GR