Consider the following relations:

Doctor (SSN, FirstName, LastName, Specialty, YearsOfExperience, PhoneNum)

Patient (SSN, FirstName, LastName, Address, DOB, PrimaryDoctor_SSN)

Medicine (TradeName, UnitPrice, GenericFlag)

Prescription (Prescription Id, Date, Doctor_SSN, Patient_SSN)

Prescription_Medicine (Prescription Id, TradeName, NumOfUnits)

Note: The Medicine relation has attributes, trade name, unit price, and whether or not the medicine is generic (True or False).

1. Determine the functional dependencies that exist in each table given above.

Example answer for - Doctor table:

Doctor (SSN, FirstName, LastName, Specialty, YearsOfExperience, PhoneNum)

Write Functional dependency exists in this table:

Doctor_SSN FirstName, LastName, Specialty, YearsOfExperience, PhoneNum,

Patient_SSN

2. After determining the functional dependencies, convert these tables to an equivalent collection of tables that are in third normal form (3NF). If they are already in 3NF justify your answer.

Example: Answer for table Doctor

Doctor (SSN, FirstName, LastName, Specialty, YearsOfExperience, PhoneNum, *Patient_SSN)

1NF: No repeating groups. So it is 1NF.

2NF : check Partial dependency on the primary key, so the relation is in 2NF.

3NF: Check non primary key dependent on another non-primary key attribute

No So it is in 3NF

Repeat this for other tables.

3. Write SQL queries to answer following questions.