Thanks. That worked a little better. There's one more thing about the bigTab. The f1's are clustered, meaning that all of the unique f1 values are loaded at the same time; e.g., if the first f1 = 1 , then subsequent records are 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, and so on. So, once the query...