Nice article. Gives me another way to de-dupe data. 🙂

I use almost the same technique, but I have a time stamp associated with each record and this time stamp differs by milliseconds. So I just pick the one which has the latest time stamp. I should point out that when you use Ranking functions on a table that has really large number of records (in my case it was close to 90 millions some times), the query performance can degrade drastically (I didnt even have an index to begin with).