The relation shown in Figure 15.12 describes hospitals (hospital Name) that require certain items (item Description), which are supplied by suppliers (supplier No) to the hospitals (hospital Name). Furthermore, whenever a hospital (h) requires a certain item (i) and a supplier (s) supplies that item (i) and the supplier (s) already supplies at least one item to that hospital (h), then the supplier (s) will also be supplying the required item (i) to the hospital (h). In this example, assume that a description of an item (item Description) uniquely identifies each type of item.

(a) Describe why the relation shown in Figure 15.12 is not in 5NF.
(b) Describe and illustrate the process of normalizing the relation shown in Figure 15.12 to 5NF.

Transcribed Image Text:

hospitalName itemDescription supplierNo Western General Antiseptic WipesS1 Western General|Paper Towels Yorkhill Western General|Antiseptic WipesS2 S2 Antiseptic Wipes S2