Reference no: EM132518369

COIT20247 - Database Design and Development Assignment - Central Queensland University, Australia

Objectives - This assessment item relates to the unit learning outcomes numbers 1, 2 and 3 as stated in the unit profile.

Part A - Database implementation using MS Access

Introduction - The sample solution of assignment 1 will be released on the unit website approximately two (2) weeks after the assignment 1 due date. You must use that sample solution of assignment 1 only for the following tasks:

Assessment task -

1. Normalization

a) Map the ERD, from the sample solution, into a set of relations in at least Third Normal Form (3NF). You must ensure that your relations meet 3NF. There is no need to show your working.

b) Select any two of your relations from the previous step, 1a), and perform the following for each of those two relations:

List all the functional dependencies exist in the relation.

Demonstrate that the relation meets Third Normal Form (3NF).

For your help, an example for a Student relation's 3NF justification has been provided (attached).

2. Relational database implementation

Note: Use the relations that you created in the above step 1 - Normalization to create a database. The recommended tool for this work is Microsoft Access, version 2010 or later. One reason for recommending Microsoft Access is that your unit lecturer/tutor will be able to provide adequate support to you in the use of this tool. The remainder of this document in Part A assumes that you are using MS-Access.

In implementing the ER model provided, you must complete the following tasks:

Create all the relations in a Microsoft Access database. Consider each attribute in every table and make appropriate choices regarding data types & sizes, indexes, required/not required and validation rules. Your choices should be appropriate for each attribute and should support data integrity. (Note: see the Data Integrity section below for specific data integrity requirements)

Create relationships as appropriate. Enforce referential integrity for all appropriate relationships in the database. Apply cascade update and/or delete options wherever necessary.

Review the default index created by Access for each table. You should ensure that the indexes follow the guidelines given in the unit textbook.

Populate the database with sample data of your own. You must include sufficient sample data to test your queries and report. Please note that the expected result of query questions may depend on the actual sample data populated.

Data integrity

Select one table that contains at least three different data type attributes, such as date, text and currency value attributes. For that selected table, develop and implement suitable integrity constraints for its attributes. You need to provide those integrity constraints in the following tabular form:

Attribute

Data type

Integrity constraint implemented

Error message

Information requests

Create queries to answer the following information requests. Note: Do not use the Access query builder (QBE) to create your queries - you should type the queries manually using SQL view/editor.

The marking process of the queries for information requests may also consider the effectiveness of your SQL statements that have been used in the queries. It is important that your SQL statements must reflect the correct business logic & SQL syntax.  

Note: Use enough sample data so that the output is produced by each and every query.

1. Display the details of customers for whom the most repair works have been performed.

2. List the details of employees who have not done any installation as on date.

3. Display the details of the customers who have contributed the maximum total amount of charges for their installation(s) and repair works.

4. Display the number of repairs, if any, that have been carried out for each of the installation.

5. Display the details of customer(s) whose name contains the word "air".

Report - Create a simple report object showing the details of installations for which no repair works have been performed. You need to provide appropriate heading and format the report properly.

Implementation Report -

You must also provide a short implementation report describing your experiences with this assignment. You may discuss any of the following:

1. Any two interesting things/procedures you have learnt by doing this assignment.

2. Any one of the assignment tasks that was relatively difficult/complex to solve but has been successfully completed by you.

Use the implementation report to demonstrate that you have thought carefully about the issues that arise when implementing a relational database.

Part B - Database Implementation using MySQL Server

Assume that CQAC is performing only installations in the premises of customers and they do not perform any AC-repair works. Consider a simplified version E-R model for the CQAC, where you only deal with three relations Customer, Installation and Employee (ignore all other relations). Based on this simplified E-R model and using MySQL Workbench, create a database schema with the above three relations, including the primary keys, foreign keys and an E-R diagram. Please see the document titled - Appendix - Guidelines and the assessment task for Assignment 2 - Part B on Moodle unit website.

For on-campus students: Demonstrate your implementation as required above in Week 10 or Week 11 tutorial time to your local tutor during the scheduled tutorial session. In one of those weeks' tutorial session, your local tutor will show you the basic skills on how to create a database using MySQL Workbench. You don't need to submit a separate file on this part.

Attachment:- Database Design and Development Assignment File.rar