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G4G0-1/Semester 1/Database Systems/Assignment/Creating Tables.md
2024-01-16 13:48:46 +00:00

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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
);
```
1. **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)
);
```
1. **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)
);
```
1. **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
);
```
1. **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
);
```
1. **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 )
);
```