Give this a try:
Select Nodes.Caption as Node,
Interfaces.Caption as Port,
(InterfaceTraffic.In_Averagebps/Interfaces.InterfaceSpeed * 100) as Percent_In,
(InterfaceTraffic.Out_Averagebps/Interfaces.InterfaceSpeed * 100) as Percent_Out
From Interfaces
JOIN Nodes on Interfaces.NodeID = Nodes.NodeID
Join InterfaceTraffic on Interfaces.InterfaceID = InterfaceTraffic.InterfaceID
Where ((InterfaceTraffic.In_Averagebps/Interfaces.InterfaceSpeed * 100) > 95
OR (InterfaceTraffic.Out_Averagebps/Interfaces.InterfaceSpeed * 100) > 95)
AND InterfaceTraffic.DateTime < DateADD(mi, -30, Current_TimeStamp)
AND Interfaces.InterfaceSpeed <> 0
Regards,
Matthew Harvey
Senior Sales Engineer
Loop1 Systems