THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!

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Comment: add link to enhanced aggregation design doc

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Note that for versions of Hive which don't include HIVE-287, you'll need to use COUNT(1) in place of COUNT.

Grouping Sets, Cubes, Rollups, and the GROUPING__ID Function

See Enhanced Aggregation, Cube, Grouping and Rollup.