Doctor(SSN, FirstName, LastName, Specialty, Years0fExperience, PhoneNum) Patient(SSN, FirstName, LastName, Address, DOB, PrimaryDoctor SSN) Medicine(TradeName, UnitPrice, GenericFlag) Prescription(Id, Date, Doctor SSN, Patient_SSN) Prescription Medicine(Prescription Id, TradeName, NumofUnits)
Doctor(SSN, FirstName, LastName, Specialty, Years0fExperience, PhoneNum) Patient(SSN, FirstName, LastName, Address, DOB, PrimaryDoctor SSN) Medicine(TradeName, UnitPrice, GenericFlag) Prescription(Id, Date, Doctor SSN, Patient_SSN) Prescription Medicine(Prescription Id, TradeName, NumofUnits)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Transcribed Image Text:Doctor (SSN, FirstName, LastName, Specialty, Years0fExperience, PhoneNum)
Patient(SSN, FirstName, LastName, Address, DOB, PrimaryDoctor_SSN)
Medicine(TradeName, UnitPrice, GenericFlag)
Prescription(Id, Date, Doctor_SSN, Patient_SSN)
Prescription Medicine(Prescription Id, TradeName, NumofUnits)
a. Write a relational algebra expression to list patient's first name, patient's last name,
and primary doctor's first name of all patients.
b. Write a relational algebra expression to list all the prescriptions given by each doctor.
Select TradeName, doctor's first name.
c. Write a relational algebra expression to list the first and last name of patients who
have no prescriptions written by doctors other than their primary doctors.
d. Write SQL statement to retrieve the number of patients that each doctor has written
prescriptions for. You must displav the doctor's first name along with the number of
prescriptions he/she wrote.
e. Write the DDL (SQL) statement to create Prescription_Medicine table. Include all the
constraints. Assume the data type for each attribute.
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