참고 : CREATE TABLE PATIENT ( /* All Patient */ PatientID VARCHAR(12) NOT NULL, /* Patient ID */ PName VARCHAR(50) NOT NULL, /* Patient name */ DOB DATE NOT NULL, /* Patient Date Of Birth */ CONSTRAINT PATIENT_PKEY PRIMARY KEY (PatientID) ); CREATE TABLE DOCTOR ( /* All Doctors */ DoctorID VARCHAR(12) NOT NULL, /* Doctor ID */ DName VARCHAR(50) NOT NULL, /* Doctor name */ SPECIALTY VARCHAR(200) NO..