Studierende stehen vor dem LC und blicken lächelnd einer Kollegin mit einer Mappe in der Hand nach.

Exercise No. 22: Travel Booking (dfm)

In this E/R schema a customer - who is of a certain type - books a travel in a travel agency. The travel agency works for a certain tour operator. The travel goes to a certain destination which belongs to a certain country. The time dimension consists of month, quarter and year.

Figure D.E.46.1 - travel booking

Please identify the fact of interest and build the attribute tree. Some attributes cannot be used for aggregation in a meaningful way. Those should be tagged as non-dimension attributes in the fact schema.

Then derive the fact schema from the tree by defining dimensions, fact attributes and hierarchies and build a glossary for the fact attributes if there are any.

Solution

This exercise is part of a case study: dfm - apa - log

Exercises List