Given the relational schema PATIENTS = (PatientName, Doctor, DoctorSpecialty, PatientGender, insurance) where all the attributes are atomic, (PatientName, Doctor, PatientGender) is the only candidate key of PATIENTS, and Doctor DoctorSpecialty. Answer the two following questions (a) and (b): a) Explain why PATIENTS does not satisfy the third normal form (3NF) with respect to the set of functional dependencies that hold on PATIENTS. Show your work. b) Use the decomposition algorithm discussed in class to decompose PATIENTS into a set of schemas such that each resulting schema is in 3NF; show your work. For each resulting schema, give its candidate keys and its complete set of non-trivial functional dependencies. You must explain in detail why EACH of your resulting

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Given the relational schema
PATIENTS = (Patient Name, Doctor, DoctorSpecialty, PatientGender, insurance)
where all the attributes are atomic, (PatientName, Doctor, PatientGender) is the only candidate key of
PATIENTS, and Doctor DoctorSpecialty.
Answer the two following questions (a) and (b):
a) Explain why PATIENTS does not satisfy the third normal form (3NF) with respect to the set of functional
dependencies that hold on PATIENTS. Show your work.
b) Use the decomposition algorithm discussed in class to decompose PATIENTS into a set of schemas such
that each resulting schema is in 3NF; show your work. For each resulting schema, give its candidate keys and
its complete set of non-trivial functional dependencies. You must explain in detail why EACH of your resulting
schemas is in 3NF.
Transcribed Image Text:Given the relational schema PATIENTS = (Patient Name, Doctor, DoctorSpecialty, PatientGender, insurance) where all the attributes are atomic, (PatientName, Doctor, PatientGender) is the only candidate key of PATIENTS, and Doctor DoctorSpecialty. Answer the two following questions (a) and (b): a) Explain why PATIENTS does not satisfy the third normal form (3NF) with respect to the set of functional dependencies that hold on PATIENTS. Show your work. b) Use the decomposition algorithm discussed in class to decompose PATIENTS into a set of schemas such that each resulting schema is in 3NF; show your work. For each resulting schema, give its candidate keys and its complete set of non-trivial functional dependencies. You must explain in detail why EACH of your resulting schemas is in 3NF.
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