Will something like this work?
Select Top 1000000 tblAssets.AssetID,
tblAssets.AssetName,
tblAssetCustom.Model,
tblComputerSystemProduct.UUID
From tblAssets
Left Join tblWarranty On tblAssets.AssetID = tblWarranty.AssetId
Left Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Left Join tblComputerSystemProduct On tblAssets.AssetID =
tblComputerSystemProduct.AssetID
Where tblAssetCustom.State = 1 And tblAssets.Assettype = -1