Page 37 Figure 2.3, with attributes excluded Case Study Schema Date Product Sales facts Store Promotion Page 37 Figure 2.3, with attributes excluded © Ron McFadyen

Case Study Schema Date Product Sales facts Store Promotion Sales Transaction Note: Sales transaction belongs in the schema – it is a degenerate dimension © Ron McFadyen

Case Study Schema in Peter Chen Notation 1 1 Product Date n n Sales facts n n n Store Promotion 1 1 1 Sales Transaction A sales fact must participate in each of the relationships – mandatory participation Each relationship is binary, and between a dimension and the fact table © Ron McFadyen