I have several daily discovery tasks for different subnet, how can I get how many new devices are discovered for example within last 2 weeks?

Hi,

I have a All-in-One Altiris Notification Server 7.5 (Virtual Machine) for PC inventory & software deployment with MSSQL database 2008 R2.

I have several daily discovery tasks for different subnet, how can I get how many new devices are discovered for example within last 2 weeks?