Mapping

A Library has decided to store information about its Stuff

and Books in a database. It has chosen to hire you as a

database designer.

1. this is mapping for System that describes its

activities according to The following Description:

• Library has a number of Employees. Each one Has

Emp_id(unique) , Name Which is represented as Fname and

Lname , Email , Salary , DateOfBirth , Bonus , Address and

Phone Number . Each Employee has a supervisor.

• Library has a set of Floors each floor has floor number and

Number of Blocks.

• There is always one employee assigned to manage that Floor

and each manager has a hiring Date.

• Floor has many employees and employees work on Only One

floor.

• The data of the user will be Recorded by one employee. Each

user has a set of attributes SSN(Unique) , Name , Email and

Phones . And the Employee will record More than one User.

• The system records the following details about Book : id and

Title.

• The Employee has to record all required data each time the

User Borrow a certain book with specified Date Borrowed,

Due_Date and Amount of money That paid for borrowing.

• Each Book May have one or more authors. Each author May

own one or more books.

• Each Book Has one Publisher , and each Publisher May

publish many Books

• Data Recorded about author and publisher [ id , Name ].

• Each book is Classified under one Category. Each category

may have many books , and each category has an id ,

Cat_Name.

• Each book is assigned to a certain Shelf , and the shelf may

contain one or more books . Shelf is defined by Code.

• Each Shelf is located on a specific floor , and the floor

contains many shelves.