Hi,
is there a professional DB developer who could help me out.. on DFD for a doctors surgery.. i understand how a ERD is produced.. but im a little puzzled on DFD...

the entities i have in my DB which have been normalised to at least 2NF are as follows:

Appointments
Doctors
Drugs
Patient Consultation History
Patients
Pharmacy
Prescriptions


thankyou ever so much, for any accurate information!