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Databse Design Draw Entity Relationship Diagram

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Questions:

1.Use the symbols as prescribed in your unit-textbook to draw the ER diagra?
 

2.Provide assumptions and business rules relevant to your ERD?

3.Map your Entity Relationship diagram (ERD) into relations and make sure that all the relations are in 3NF?

 

Anwers:

Identification of Entities

  1. Medical specialists
  2. Consultations
  • Procedures
  1. Patients
  2. Appointments
  3. General medical practitioner (GPs)
  • Medical history
  • Tests
  1. Prescription
  2. Charges
  3. Invoice

Identifying Attributes of the Entities

1.Medical specialists

Specialist ID

Specialist First name

Specialist Last name

DOB

Contacts

Address

2.Consultation

Consultation ID

Referral letter

Specialist ID

Specialist remarks

3.Patient

Patient ID

Patient Name

Gender

DOB

Phone number

Telephone

Address

Comments

4.Medical history

Patient ID

Past surgeries

Current medicines

Current dosage

Medication allergies

5.Booking

Booking ID

Patient ID

Date of booking

Appointment ID

6.General practitioner

Medical Provider Number

Name

Contact number

Address

7.Referral Letter

Letter ID

Notes

Medical Provider Number

8.Test

Test ID

Test description

9.Procedure

Procedure ID

Procedure description

10.Prescription

Prescription id

Description

11.Appointment

Appointment ID

Patient ID

Specialist ID

Phone call

Personal visit

12.Invoice

Invoice number

Appointment ID

Total charges

2: Business Rules and assumptions

The general practitioner may issue one or more referral letters. Many referral letters may be issued by one general practitioner.

One patient may have many referral letters while many referral letters may belong to one patient.

One patient may have one or more medical history reports. Many history reports may belong to one patient.

One patient may make one or more bookings for appointment while many bookings may be made by one patient

One booking makes only one appointment while one appoints has only one booking

One appointment may result to many invoices while many invoice which each invoice must be attached to an appointment

Each appointment must have one or more consultation while each consultation must have an appointment

Each appointment may have one or more tests while each test must have an appointment

Each appointment may have one or more prescriptions while each prescription must have an appointment

Each appointment may have one or more procedure while each procedure must have an appointment

3: Logical design in 3NF

Medical specialist (SpecialistID, Specialistname, DOB, Contacts, Address)

Consultation (ConsultationID, ReferralletterID, SpecialistID, TestID, ProcedureID, PrescriptionID, AppointmentID, Specialistremarks)

Foreign key (ReferralletterID) references Referral Letter (ReferralletterID)

Foreign key (SpecialistID) references Medical specialists (SpecialistID)

Foreign key (TestID) references Test (TestID)

Foreign key (ProcedureID) references Medical specialists (ProcedureID) 

Foreign key (PrescriptionID) references Prescription (PrescriptionID)

Foreign key (Appointment) references Appointment (AppointmentID)

Patient (PatientID, PatientName, Gender, DOB, Phonenumber, Telephone, Address, Comments)

Medical history (PatientID, Pastsurgeries, Currentmedicines, Currentdosage, Medicationallergies)

Foreign key (PatientID) references patient (PatientID)

Booking (BookingID, PatientID, Date of booking, AppointmentID, SpecialistID)

Foreign key (PatientID) references patient (PatientID)

Foreign key (AppointmentID) references Appointment (AppointmentID)

Foreign key (SpecialistID) references SpecialistID (SpecialistID)

General practitioner (MedicalProviderNumber, Name, contactnumber, address)

Referral Letter (ReferralletterID, Notes, MedicalProviderNumber)

Foreign key (MedicalProviderNumber) references general practitioner (MedicalProviderNumber)

Test (TestID, Testdescription)

Procedure (ProcedureID, Proceduredescription)

Prescription (PrescriptionID, Description)

Appointment (AppointmentID, PatientID, SpecialistID, time, duration)

Invoice (Invoicenumber, Appointment ID, Totalcharges)

Foreign key (Invoicenumber) references invoice (Invoicenumber)

 

References

Buxton, S. (2009). Database design. 1st ed. Amsterdam: Morgan Kaufmann Publishers/Elsevier.

Demba, M. (2013). Algorithm for Relational Database Normalization Up to 3NF. International Journal of Database Management Systems, 5(3), pp.39-51.

Garmany, J., Walker, J. and Clark, T. (2005). Logical database design principles. 1st ed. Boca Raton, Fla.: Auerbach Publications.

Howe, D. (2003). Data analysis for database design. 1st ed. Oxford [u.a.]: Butterworth Heinemann.

Shoval, P. and Even-Chaime, M. (2012). Database schema design: an experimental comparison between normalization and information analysis. ACM SIGMIS Database, 18(3), pp.30-39.

Watt, A. and Eng, N. (2014). Database design. 1st ed. [Place of publication not identified]: [publisher not identified].

OR

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