COIT20247 Database Design and Development (T2 2019) Assessment item 2—Assignment 2 Due date 11:45pm on Friday of Week 10 (September 27, 2019) Weighting 35% Length Not applicable 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 (30 Marks) 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. ii. The primary key is StudentID. This is the only candidate key since Name is not guaranteed to be unique (two different students may have the same name). Address is also not guaranteed to be unique. This means that Student ID functionally determines every other attribute in the table. There is a single valued simple candidate key (StudentId) and therefore no partial dependencies are possible. Hence, the relation is in 2NF. iii. Name cannot be used to functionally determine any other attribute in the table since two different students may have the same name; likewise for address and date of birth. Therefore there are no transitive dependencies in the table. Therefore it meets the requirements of first, second and third normal form. 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 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 Create a simple report object showing the details of each rental contract with the lease length greater than or equal 6 months. The details include the customer name, phone, contract start date, contract end date, the property address, and the weekly rental. At the end of report, display the average value of the weekly rental for these rental activities. 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’. 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 learnt by doing this assignment. 2. Any one requirement of the assignment that was relatively difficult / complex to solve but 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. What you should submit Microsoft Access databases file containing: 1. Tables with sample data 2. Relationships 3. Queries 4. Integrity constraints 5. Report (object). A Microsoft Word document containing: 1. A set of relations mapped from E-R diagram (3NF) 2. Two relations with functional dependencies and demonstration of normalization 3. Implementation report Your document should contain appropriate identification information (your student number, name, unit number, etc.) and should contain the relevant headings for each section. Part B. Database implementation using MySQL Server (5 Marks) Consider a simplified version E-R model on the property rental activity, where you only deal with three relations Customer, Rental and Property (ignore all other relations) based on the E-R model provided for assignment 1 sample solution. Using MySQL Workbench 6.3 CE to create a database with the above three relations, include specifying the primary keys, foreign keys and drawing an E-R diagram. Alternatively, you can complete the above task by using My SQL 5.7 Command Line Client to create the database and corresponding tables with sample data populated. For on-campus students, demonstrate your implementation as required above in Week 10, or Week 11 or Week 12 tutorial time to your local tutor during the scheduled tutorial session. In one of these 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. Please see a document titled – Appendix – Guidelines and the assessment task for Assignment 2 – Part B on moodle course website. For distance students, include the file (CQUPM.mwb, created by MySQL Workbench 6.3) in a zip file and email it to the Unit coordinator (email@example.com) by the end of Week 11. Important points You must work individually on this assignment. The model solution to this assignment will be released approximately two (2) weeks after the due date. Assignments that are submitted after the release of the model solution will receive zero marks. You must state in your word document the details of all materials and sources that you used to complete this assignment. This may be as simple as ‘This assignment was completed using only the COIT 20247 unit materials’. Extension requests (by filling in an online form) should be submitted before the assignment due date. Before submitting your assignment, review the marking criteria provided on the last page of this document. Ensure that all the criteria are addressed in your submission. Penalties related to late submission and plagiarism will be applied as per University policy. Assessment criteria COIT20247 Assignment 2 Marking Sheet 1 Relational database implementation (13 marks) Available marks Set of relations correctly mapped from ERD 4 Functional dependencies correctly listed for two of the relations 2 Normalization correctly listed for two of the relations 2 Relationships set up correctly, referential integrity enforced, appropriate use of cascade update/delete 2 Data types & sizes selected appropriately 2 Indexes – Indexes are appropriate 1 2 Data integrity (2 marks) Data integrity correctly implemented 2 3 Queries (10 marks) Query 1 2 Query 2 2 Query 3 2 Query 4 2 Query 5 2 4 Report (4 marks) Underlying query/queries has/have been created and are correct 2.5 Report layout and heading are appropriate 1.5 5 Implementation report (1 marks) Implementation report discusses appropriate issues 1 6 Part B (5 marks) 5 Sub-total before any possible deductions 35 Late penalty (enter as the number of days late) Plagiarism penalty (enter the negative marks) Assignment 2 total /35 ~~~For this or similar assignment papers~~~
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