There are various tables used for this, and calculations are made to determine what the most recent event was. For example, this would tell you the last time each computer requested a new configuration.
select vc.Name,max(StartTime) as 'Max start time'
from CollectionMembership cm
join vComputer vc on cm.Resourceguid = vc.Guid
left join Evt_NS_Client_Config_Request cr
on cm.ResourceGuid = cr.ResourceGuid
GROUP BY vc.Name
ludovic_ferre's post is a good place to start if you are interested:
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