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Bjarne Berg Homework #1 for Dr. Wu Data warehousing

Bjarne Berg Homework #1 for Dr. Wu Data warehousing. 1). 2). DSLG. DSG. DLG. SLG. DSL. SL. SG. DL. DG. LG. DS. G. S. L. D. all.

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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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