I KNOW this has been covered before, but I cannot seem to find it now in the searches I've run (and I checked the Useful SQL Queries thread, but didn't see what I was looking for in there).
I want to change the subject of some threads that are getting moved from one board to another (in 6.4). I can manually change the parent/original post for each thread, but all the replies still have the original subject, so I want to change all the replies that link to that parent at once with a SQL command.