OLAP Operation Types

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    ROLL-UP:The roll-up operation also called drill-up or aggregation operation performs aggregation on a data cube, either by climbing up a concept hierarchy for a dimension or by climbing down a concept hierarchy i.e dimension reduction. It goes from less-detailed data to more-detailed data.

    CUBE:OLAP cube is a method of storing data in a multidimensional form, generally for reporting purposes.