Which OLAP operation involves reducing the dimensionality of a data cube by fixing one or more dimensions at a single value?
- Dice
- Drill-down
- Roll-up
- Slice
The OLAP operation that involves reducing the dimensionality of a data cube by fixing one or more dimensions at a single value is "Roll-up." This operation allows for aggregation or summarization of data, moving from lower-level detail to higher-level summaries, providing a more compact view of the cube.
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