A combined medical and herbal center wants to create aPrescription database to keep track of its medics,patients, herbal medicine, diagnosis, and herbal prescriptions. Forsimplicity, both a herbal medic and apatient will be recorded for his or her name; aherbal medicine will be recorded for its name,unit and the price per unit; a diagnosis will berecorded for a line of textual description, the date of thediagnosis, and the relevant patient and medic; and aprescription will be recorded for its date, thepatient and medic, and all the herbs included in the prescription.We note that a unit for a herbal medicine could be
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