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RE: Against the Grain: Pascal commentary about XML and databases

> "gee could you roll
> up the sales by category and month?"

Yeah, but if he asked you to roll up the TOP FIVE sales, you'd be stuck:
it's not a relational query, it's a relative query. And you can't perform it
in any SQL query logic that I know of (although a good DBA can pull off some
damned-near miracles).