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 below: STUDENT (StudentID, Name, Address, DateOfBirth)

i. The primary key is StudentID which identifies a student. There will be one student name per Student ID because only one name is recorded for each student. Even though a student may have multiple addresses (e.g. a home address and a work address), the case study states that there is a need to record the home address only and hence there will be only one address for each student. There will be only one date of birth for each student. Thus, there are no repeating groups. Hence, this relation is in 1NF.

• 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

• You are required to implement integrity constraints within the database to enforce the following requirements:
• The weekly rental in the tables of Property and Rental should be positive currency and
• expressed in 2 decimals only.
• The contract end date must be later than the contract start date in the table of Rental.
• The job description in the Repair_Job table should not be blank.
•  For the table of Property, the possible value of property type only takes either
• “apartment” or “house”.
• 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 statement must reflect the correct business logic & SQL syntax. (Use enough sample data so that the output is produced by each and every query).

1. Which properties have never been rented out? List the details that include the property address, type, weekly rental as well as the name of the property owner.

2. How many properties have been managed by each manager? Show the manager’s name, the number of properties managed. Order the list so that the manager who has managed the most properties appears first.

3. List the details of repair jobs performed by handymen in the last 6 months. The details should include the job ID, job description, the completed date, charge and the handyman’s name.

4. Which properties have received more than one application in the last 6 months from customers? Show the property ID, address, the weekly rental and the number of applications.

5. Find out the details of the rental activities that have the highest weekly rentals. The details should include customer’s names, the address of the properties and the weekly rentals.

• Report

• Hints:
•  Create a query that lists all details needed for a report. If you are unable to formulate this query, then create a report that is based directly on the table(s). [Note: you will not be able to obtain full marks for the report creation if you base your report directly on
• the table(s) and some criteria are not met in your reports.]
• Use the report wizard to generate a basic report based upon your query [or the table(s) if you were unable to formulate the query].
• Once the report wizard finishes, switch to design view and rename the labels appropriately; for example, change the label ‘StartDate’ to ‘Start Date’.