Markus Ehrenmüller-Jensen has experiences with different customers of all types concerning datawarehousing, etl, and business intelligence as project leader and trainer since 1994. He is an educated software-engineer, graduated business educator and professor for “business, economics and law” at HTL Steyr (technical college) and fully certified as MCITP Database Administrator, Database Developer und Business Intelligence Developer and MCT. Markus speaks regularly on international conferences and writes articles for well-known journals.
Hierarchies are the bread and butter of most business applications (departmental diagram, product categories, sales territories, calendar, …). See typical business problems and how they are solved in SQL Server.