>>ProductLevel = RTM
>>
>>Which is meaningless.
>
>Why? It means that you don't have any service packs installed.

RTM means Released to Manufacturing. For all I know, they could have done a later release of that included the service packs. Why have they made this so obscure?

>>Even if I know which service pack I have, there seems to be know way of knowing if I have all patches that have been released since that service pack.
>
>I'm not sure what you mean. As I mentioned before, SP4 is the latest one. All servise packs are cumulative so you've to install only the latest one.

What about SQL Server patches that come along between service packs?