Select tblComputers.Computername, tblRegistry.Value,
tblComputerSystemProduct.IdentifyingNumber
From tblComputers Inner Join
tblRegistry On tblComputers.Computername = tblRegistry.Computername Inner Join
tblComputerSystemProduct On tblComputers.Computername =
tblComputerSystemProduct.Computername
Where tblRegistry.Valuename = 'Assettag'