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What's kind of funny is that a decade ago the question would have probably been is it still worthwhile to consider a relational database since multidimensional databases allow such higher levels of data organization. Since then, relational databases have become the "go-to" standard, general purpose tool for data management. For most purposes the relative ease of use (if you know SQL) and flexibility of a relational database is the best choice. On the other hand, if you have a task that requires multiple variable events, it can make more sense to organize the data in the "cube" model of a MDDB, which makes it possible to use the quantitative descriptions of an event set to analyze each dimension at different detail levels.