torsdag 27 augusti 2009

Handling employee dimensions, and other hierarichal dimensions

Everyone working with Business Intelligence must have heard of Mr Kimball. While reading newsletters from various BI sites I came across a interesting article from Kimball University. The article discuss how to handle an employee dimension so that hierarchies can be easily traversed when doing reporting and ad-hoc queries, while keeping query performance and enabling type 2 slowly chanching dimensions.

Since employee dimensions can be rather large it's also important that the amount of rows is kept to a minium.

Take a look at the article to get some inspiration on how to design the warehouse to efficiently handle complex hierarchies.;jsessionid=ZUPYEMPNT1G1DQE1GHPCKHWATMY32JVN?articleID=219400252&pgno=1

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