SCCM report to list machines where and When RAM changed?

This report will list the computers where and When the RAM is changed ?

select
CS.Name0,
CS.UserName0,
RAM.TotalPhysicalMemory0,
RAM.TimeStamp,
HRAM.TotalPhysicalMemory0,
Max(HRAM.TimeStamp)
from
dbo.v_GS_COMPUTER_SYSTEM CS,
dbo.v_GS_X86_PC_MEMORY RAM,
dbo.v_HS_X86_PC_MEMORY HRAM
Where CS.ResourceID = RAM.ResourceID
and CS.ResourceID = HRAM.ResourceID
and RAM.TotalPhysicalMemory0 != HRAM.TotalPhysicalMemory0
Group by
CS.Name0,
CS.UserName0,
RAM.TotalPhysicalMemory0,
RAM.TimeStamp,
HRAM.TotalPhysicalMemory0