What advantage does multidimensional report writing have on query maintenance for complex queries?

Question

Options

• AThere is no need to use calculations as the data source contains all the required data items.
• BFewer queries are required and the need for unions of queries is reduced due to the flexibility of
• CUnions and Joins are always required for queries making it easier for a developer to understand
• DThere is no advantage and multidimensional query constructs should be avoided.

• A
  15% (5)
• B
  73% (24)
• C
  3% (1)
• D
  9% (3)

Explanation

Multidimensional report writing lets a single query slice data across multiple dimensions (time, region, product, etc.) without needing separate queries or UNION statements to combine them - this is why B is correct: the flexibility of the dimensional model reduces the total number of queries needed and eliminates many union-heavy workarounds common in relational reporting.

Why the distractors are wrong:

• A is wrong because calculations are still often needed; having the right data items in a source doesn't eliminate the need to aggregate, ratio, or transform them.
• C is wrong and actually describes a disadvantage - requiring unions and joins on every query increases complexity, not simplicity.
• D is wrong because multidimensional constructs are widely used precisely because of their maintenance advantages over complex relational queries.

Memory tip: Think of multidimensional as a pivot table on steroids - one structure, many views, no duct-taping queries together with UNION.

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