On completion of Exercise 13.15 examine the 3NF relations created to represent the attributes shown in the relation that displays dentist/patient appointment data in Figure 13.19. Determine whether these relations are also in BCNF. If not, transform the relations that do not conform into BCNF.

Exercise 13.15:

The table shown in Figure 13.19 lists sample dentist/patient appointment data. A patient is given an appointment at a specific time and date with a dentist located at a particular surgery. On each day of patient appointments, a dentist is allocated to a specific surgery for that day.

(a) The table shown in Figure 13.19 is susceptible to update anomalies. Provide examples of insertion, deletion, and update anomalies.

(b) Identify the functional dependencies represented by the attributes shown in the table of Figure 13.19. State any assumptions you make about the data and the attributes shown in this table.

(c) Describe and illustrate the process of normalizing the table shown in Figure 13.19 to 3NF relations.

Identify the primary, alternate, and foreign keys in your 3NF relations.