This query is used to select the devices based on a specific Active Monitor type and associated comment. For example, we are going to list all devices that have Interface Active Monitor and these monitors has comment contains Ethernet.
SELECT DISTINCT Device.nDeviceID, Device.sDisplayName FROM Device
LEFT OUTER JOIN PivotActiveMonitorTypeToDevice ON PivotActiveMonitorTypeToDevice.nDeviceID = Device.nDeviceID
LEFT OUTER JOIN ActiveMonitorType ON ActiveMonitorType.nActiveMonitorTypeID = PivotActiveMonitorTypeToDevice.nActiveMonitorTypeID
WHERE Device.bRemoved = 0 AND
ActiveMonitorType.sMonitorTypeName LIKE N'Interface'
AND PivotActiveMonitorTypeToDevice.sComment LIKE '%Ethernet%'
You can use this query to create Dynamic group and generate reports for these devices only.