Task 1 – (LO1) Use an appropriate design tool to design a relational database system for a substantial problem
Task 1.1
(P1) Design a relational database system using appropriate design tools and techniques, containing at least four interrelated tables, with clear statements of user and system requirements.
a. Identify the user and system requirements to design a database for the above scenario.
b. Identify entities and attributes of the given scenario and design a relational database system using conceptual design (ER Model) by including identifiers (primary Key) of entities and cardinalities, participations of relationships.
c. Convert the ER Model into logical database design using relational database model including primary keys foreign keys and referential Integrities. It should contain at least five interrelated tables.
Note:-It is allowed to have your own assumptions and related attributes within the scope of the case study given.
Task 1.2
(M1) Produce a comprehensive design for a fully functional system, which includes interface and output designs, data validations and data normalisation.
a. Explain data normalization with examples. Check whether the provided logical design in task 1.1 is normalised. If not, normalize the database by removing the anomalies.
b. Design set of simple interfaces to input and output for the above scenario using Wireframe or any interface-designing tool.
c. Explain the validation mechanisms to validate data in the tables with examples.
Task 1.3
(D1) Assess the effectiveness of the design in relation to user and system requirements
a. Check whether the given design (ERD and Logical design) is representing the identified user and system requirements to access the effectiveness of the design.
Task 2 - LO2 Develop a fully functional relational database system, based on an existing system design
Task 2.1
(P2) Develop the database system with evidence of user interface, output and data validations, and querying across multiple tables.
a. Develop a relational database system according to the ER diagram you have created (Use SQL DDL statements).
b. Provide evidence of the use of a suitable IDE to create a simple interface to insert, update and delete data in the database
c. Implement the validation methods explained in task 1.2-part c.
d. Display the details payment with the job details and the customer details using Join queries
Task 2.2
(P3) Implement a query language into the relational database system
a. Explain the usage of DML with below mentioned queries by giving at least one single example per each case from the developed database.
Select
Update
Delete
Note: - The queries you have selected should be meaningful and relevant to the given scenario.
Task 2.3
(M2) Implement a fully functional database system, which includes system security and database maintenance.
a. Explain how security mechanisms have been used and the importance of these mechanisms for the security of the database. Implement proper security mechanisms (EX: -User groups, access permissions) in the developed database.
Task 2.4
(M3) Assess whether meaningful data has been extracted using query tools to produce appropriate management information.
a. Explain the usage of the below SQL statements with the examples from the developed database
Group by
Order by
Having
Between
Where
Task 3 - LO3 Test the systems against user and system requirements
Task 3.1
(P4) Test the system against user and system requirements.
a. Provide a suitable test plan to test the system against user and system requirements
b. Provide relevant test cases for the database you have implemented
Note:- Learner needs to give expected results in a tabular format and screenshots of the actual results with the conclusion
Task 3.2
(M4) Assess the effectiveness of the testing, including an explanation of the choice of test data used.
a. Explain how the selected test data in task 3.1 b) can be used improve the effectiveness of testing.
Task 3.3
(D2) Evaluate the effectiveness of the database solution in relation to user and system requirements, and suggest improvements.
a. Get independent feedback on your database solution from the non-technical users and some developers (use surveys, questioners, interviews or any other feedback collecting method) and make recommendations and suggestions for improvements in a separate conclusion/recommendations section.
Task 4- LO4 Produce technical and user documentation
Task 4.1
(P5) Produce technical and user documentation.
a. Prepare a simple users’ guide and a technical documentation for the support and maintenance of the software.
Task 4.2
(M5) Produce technical and user documentation for a fully functional system, including diagrams showing movement of data through the system, and flowcharts describing how the system works.
a. Your technical documentation should include some of the UML diagrams (Use case diagram Class diagram, etc.), flow charts for the important functionalities, context level DFD and the Level 1 DFD
Task 4.3
(D3) Assess any future improvements that may be required to ensure the continued effectiveness of the database system.
a. Suggest the future improvements that may be required to ensure the continued effectiveness of the database system.