Query for Workstations with low disk space (less than 5GB)

select
  SMS_R_SYSTEM.ResourceID,
SMS_R_SYSTEM.ResourceType,
SMS_R_SYSTEM.Name,
SMS_R_SYSTEM.SMSUniqueIdentifier,
SMS_R_SYSTEM.ResourceDomainORWorkgroup,
SMS_R_SYSTEM.Client ,
SMS_G_System_LOGICAL_DISK.FreeSpace,
SMS_G_System_LOGICAL_DISK.Size
from 
SMS_R_System 
inner join SMS_G_System_LOGICAL_DISK on SMS_G_System_LOGICAL_DISK.ResourceID = SMS_R_System.ResourceId

where
SMS_G_System_LOGICAL_DISK.FreeSpace < 5000