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

Exercise No. 4: Courses (dfm)

This simplified E/R-schema contains data about employees attending courses.

Each employee belongs to a certain department and each course is of a certain type. The time dimension consists of month and year.

Figure D.E.13.1 - Employees attend courses

Please identify the fact of interest and build the attribute tree. No attributes have to be pruned or grafted.

Please also 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.

Please include an additional fact attribute counting the number of attendances.

Solution

Exercises List