Yé Y, Wahser U: "Using the Concept of Info-Cubes to Facilitate Data Analysis in Demographic Surveillance Systems"
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Slide 12: Problems of the RM

The previous example has show, how data have to be collected with complex queries.

Experience shows, that the design of the queries is normally too difficult, since the complex model is difficult to understand. Thus skilled staff is needed in order to do the querying.

These observations show, that the relational model is not optimized for OLAP. OLAP needs a structure, which is more oriented at the structures of the desired output.

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Last Revision: July 2001