What is(are) the clustering column(s) on the table? You need to read each 1/4 of the table at a time using the appropriate clustering key range.
What are there nonclustering indexe(es)? (in case they are needed to determine the clustering key ranges).
SQL DBA,SQL Server MVP(07, 08, 09) "It's a dog-eat-dog world, and I'm wearing Milk-Bone underwear." "Norm", on "Cheers". Also from "Cheers", from "Carla": "You need to know 3 things about Tortelli men: Tortelli men draw women like flies; Tortelli men treat women like flies; Tortelli men's brains are in their flies".