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Semester 1/Database Systems/Assignment/Creating Tables.md

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