Hi , Is this what your after :
Select Top 1000000 tblAssets.AssetID,
  tblAssets.AssetName,
  tsysAssetTypes.AssetTypename As AssetType,
  tsysAssetTypes.AssetTypeIcon10 As icon,
  tblAssets.Domain,
  Coalesce(tsysOS.OSname, tblLinuxSystem.OSRelease, tblMacOSInfo.SystemVersion)
  As OS,
  tblAssetCustom.Model,
  tblAssetCustom.Manufacturer,
  tblAssets.IPAddress,
  tsysIPLocations.IPLocation,
  tblAssets.Mac As MACAddress,
  tblADComputers.OU,
  tblState.Statename As State,
  tblAssets.Firstseen,
  tblAssets.Lastseen,
  tblAssets.Lasttried,
  tblAssets.Description,
  tblAssetCustom.PurchaseDate,
  tblAssetCustom.Warrantydate,
  tblAssets.FQDN,
  tblAssetCustom.DNSName,
  tblAssetCustom.LastPatched,
  tblAssetCustom.LastFullbackup,
  tblAssetCustom.LastFullimage,
  tblAssetCustom.Location,
  tblAssetCustom.Building,
  tblAssetCustom.Department,
  tblAssetCustom.Branchoffice,
  tblAssetCustom.BarCode,
  tblAssetCustom.Contact,
  tblAssetCustom.Serialnumber,
  tblAssetCustom.OrderNumber,
  tblAssetCustom.Custom1,
  tblAssetCustom.Custom2,
  tblAssetCustom.Custom3,
  tblAssetCustom.Custom4,
  tblAssetCustom.Custom5,
  tblAssetCustom.Custom6,
  tblAssetCustom.Custom7,
  tblAssetCustom.Custom8,
  tblAssetCustom.Custom9,
  tblAssetCustom.Custom10,
  tblAssetCustom.Custom11,
  tblAssetCustom.Custom12,
  tblAssetCustom.Custom13,
  tblAssetCustom.Custom14,
  tblAssetCustom.Custom15,
  tblAssetCustom.Custom16,
  tblAssetCustom.Custom17,
  tblAssetCustom.Custom18,
  tblAssetCustom.Custom19,
  tblAssetCustom.Custom20,
  Case tblAssetCustom.PreventCleanup
    When 0 Then 'No'
    When 1 Then 'Yes'
  End As PreventCleanup,
  tblAssets.Scanserver,
  tblAssetGroups.AssetGroup
From tblAssets
  Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
  Inner Join tsysAssetTypes On tsysAssetTypes.AssetType = tblAssets.Assettype
  Inner Join tsysIPLocations On tsysIPLocations.LocationID =
    tblAssets.LocationID
  Left Join tblADComputers On tblAssets.AssetID = tblADComputers.AssetID
  Inner Join tblState On tblState.State = tblAssetCustom.State
  Left Join tblLinuxSystem On tblAssets.AssetID = tblLinuxSystem.AssetID
  Left Join tsysOS On tblAssets.OScode = tsysOS.OScode
  Left Join tblMacOSInfo On tblAssets.AssetID = tblMacOSInfo.AssetID
  Inner Join tblAssetGroupLink On tblAssets.AssetID = tblAssetGroupLink.AssetID
  Inner Join tblAssetGroups On tblAssetGroups.AssetGroupID =
    tblAssetGroupLink.AssetGroupID
Where tblAssetGroups.AssetGroup Like '%Network Devices%' And tblAssets.Assettype <> 208
Order By tblAssets.AssetName