[docwra]

I tried the sync to TADB addon, but it doesn't work.
It writes the track rating to every track it finds with that name, regardless of what album (studio version, live, etc.)
So the SQL route is the only option i guess.

 
Yep this is how it works, but live versions tend to be named differently which is why it works that way. It does use the MBIDs but we designed it to catch all songs instead of only one.

I use the TADB Add-on and the last.fm script I posted a while back and it works pretty well syncing all my devices with the extra "rating" and "plays" data.

You are correct though, it does have the downside that it applies to all tracks named the same.