Databases

3. Design ER Model for Hospital databases. Each Doctor is described by Doc ID, Phone, address, and specialization. Each doctor is allowed to work in only one department. Each department is described by Dept no, Name, and is supervised by a doctor. Each patient is described by Card number, name, address, and phone. Each patient is assigned to one or more department. Its required to keep track each admission date. Each lab is described by LabNo, name. Its required to keep track any lab service that may be done to the patient.

4. Design ER Model for a library to manage data of books. The library contains books which are described by an ISBN, Title, Specialization. Each Book is published by one Publisher and written by many Authors. A publisher is described by name, ID, Address, Fax and Phone number. An author is described by name, ID, Address, Fax and Phone number. Each author writes many books.