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Bjarne Berg Homework #1 for Dr. Wu Data warehousing

This homework assignment explores the complexities of data cuboids within a data warehousing context, particularly focusing on the spectator and locational data dimensions. By materializing cuboids for classes within the spectator dimension, we create a more intricate lattice structure that requires careful selection from specific cuboids, such as the ScsL cuboid for class and student data. The assignment delves into the mathematical implications of cuboids, emphasizing the number of cuboids generated by dimensional hierarchies and excluding certain values to determine total levels.

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Bjarne Berg Homework #1 for Dr. Wu Data warehousing

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  1. Bjarne Berg Homework #1 for Dr. Wu Data warehousing

  2. 1)

  3. 2) DSLG DSG DLG SLG DSL SL SG DL DG LG DS G S L D all 3) select from the cubeoid containing the spectator data and the locational data (SL in first example). If we have materialized the cubeoids for the classes within the spectator dimension, we would have a much more complex lattice and we would have to select from the ScsL cuboid where c=class and s=student as a conditional value of that class (materialized). This cuboid would also have the value for charge for this intersection.

  4. 3) Number of cuboids = 2N Whereas we have 4 dimensions with a combined number of levels in the hierarchies of 9; if we exclude ‘all’ we would have 29 = 512 2 levels 3 levels 1 level 3 levels

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