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BIT231: Database Systems Database Report

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This assignment is centred on ER modelling, a graphical tool used in database design and Normalization which is a text-based tool to remove unnecessary redundancy in a database. A construction company requires a database to record details about building projects. Each project has its own project number, name and employees assigned to it. Each employee has an employee number, name and job classification, such as an engineer or computer technician. Written computer-based assessment of Database Modelling and SQL concepts to work on Assessment 1. The class test consists of short answers ques...

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Question Preview:

This assignment is centred on ER modelling, a graphical tool used in database design and Normalization which is a text-based tool to remove unnecessary redundancy in a database. A construction company requires a database to record details about building projects. Each project has its own project number, name and employees assigned to it. Each employee has an employee number, name and job classification, such as an engineer or computer technician. Written computer-based assessment of Database Modelling and SQL concepts to work on Assessment 1. The class test consists of short answers question about the basic concepts of Database modelling and Normalization. Write Business rules to create an ER Diagram.

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It is processed to eliminate the data duplication or redundancy from a database. Un-Normalized database design is inconsistent in nature and creates issues during addition, deletion or updating of information.

The above relation is not in 3NF because two non-key attributes like JobClasstype andHourRate are functionally dependent on each other.

CREATE SCHEMA AUTHORIZATION scott

CREATE TABLE Company

(Licno char(5),Co_name char(15),

Co-type char(20),

Co_address varchar2(50),

Co_phone Number(10),

Proj_No Number(2),

Emp_No Number(3))

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