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Semester 1/Database Systems/Assignment/postgre Compatible.md

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+1. **Hospital** Table
+```SQL
+CREATE TABLE hospital (
+	hospital_id CHAR(3) CONSTRAINT hID_pk PRIMARY KEY,
+	hospital_name VARCHAR(30),
+	city VARCHAR(15),
+	postcode VARCHAR(8) CONSTRAINT postcode_unique UNIQUE
+);
+```
+
+2. **Transplant_Unit** Table
+```SQL
+CREATE TABLE transplant_unit (
+	unit_id CHAR(4) CONSTRAINT uID_pk PRIMARY KEY,
+	hospital_id CHAR(3),
+	specialisation VARCHAR(20),
+
+	CONSTRAINT hID_fk FOREIGN KEY ( hospital_id ) REFERENCES hospital( hospital_id )
+);
+```
+
+3. **Organ** Table:
+```SQL
+CREATE TABLE organ (
+	organ_id CHAR(3) CONSTRAINT oID_pk PRIMARY KEY,
+	organ_type VARCHAR(15) 
+);
+```
+
+4. **Patient** Table:
+```SQL
+CREATE TABLE patient (
+	patient_id CHAR(3) CONSTRAINT pID_pk PRIMARY KEY,
+	patient_name VARCHAR(10),
+	age INTEGER
+);
+```
+
+5. **Donor** Table:
+```SQL
+CREATE TABLE donor (
+	donor_id CHAR(3) CONSTRAINT dID_pk PRIMARY KEY,
+	donor_name VARCHAR(10),
+	age INTEGER
+);
+```
+
+6. **Operation** Table
+```SQL
+CREATE TABLE operation (
+	operation_id CHAR(3),
+	organ_id CHAR(3),
+	unit_id CHAR(4),
+	patient_id CHAR(3),
+	donor_id CHAR(3),
+	
+	CONSTRAINT comp_op_key PRIMARY KEY ( operation_id, organ_id ),
+	CONSTRAINT oID_fk FOREIGN KEY ( organ_id ) REFERENCES organ( organ_id ),
+	CONSTRAINT uID_fk FOREIGN KEY ( unit_id ) REFERENCES transplant_unit( unit_id ),
+	CONSTRAINT pID_fk FOREIGN KEY ( patient_id ) REFERENCES patient( patient_id ),
+	CONSTRAINT dID_fk FOREIGN KEY ( donor_id ) REFERENCES donor( donor_id )
+);
+```