SIT772 Database and Information Retrieval

Transcription

1 SIT772 Database and Information Retrieval Assessment Task 1 This assessment task enables students to demonstrate their proficiency against the first three Unit Learning Outcomes (ULOs) of this unit. ULO1: Define the difference between data and information and the difference between a traditional multiple-file system and a database. ULO2: Explain the concept of data modelling and use Entity-Relationship (ER) models to represent data. ULO3: Design and implement relational database systems through the use of SQL Please read the rubric carefully as it outlines what criteria your assessment will be evaluated on. Assessment 1 (Individual) Written report and SQL script Weight (% total mark) 30 Due date Monday 8 January PM AEST Submission method Through CloudDeakin via FutureLearn Referencing style Harvard

2 Instructions Read these instructions and the following four questions. Answer as many questions as possible. Place your name, ID and answers in your document. Please submit your word file with your answers and graphs (embedded) where appropriate as a SINGLE document in the Submission Portal. Do not submit PDF files. Question 1 (5 marks) Problem statement University A has decided that a new database system is needed for reporting students grades. Students at this university are identified by their student ID, and the database system should store their names and major area of study. Units in a degree course are identified by the Unit ID. For each unit within a degree course, the database system (DB) should capture the unit title, unit location of offer and the name of the instructor. The database system should therefore store the grade for each student studying every unit in the degree course. Describe the elements of the table of this database system. Draw the Entity Relationship Diagram (ERD) of the generated tables. Write the SQL code to create the tables. Question 2 (10 marks):

3 You are given the Customer 1, Customer 2, and Invoice tables in the database below: Table name: Customer 1 CUST_NUM CUST_LNAME CUST_FNAME CUST_BALANCE 100 Jones Joanna Smith Jane Table name: Invoice INV_NUM CUST_NUM INV_DATE INV_AMOUNT OCT OCT OCT OCT OCT Table name: Customer 2 CUST_NUM CUST_LNAME CUST_FNAME 1000 Smith Jane 1001 Fernandez Tom 1002 McDonald Edward 1003 Adams Elizabeth 1004 Harvey Richard For each of the following exercises please provide a screenshot of SQL query execution. Write the SQL code to create the above three tables, and insert the sample data into the tables. Write the SQL query to generate a combined list of customers (from Customer 1 and Customer 2 tables) that does not include any duplicate customer records. (Note that only the customer name: Jane Smith shows up in both customer tables.) Write the SQL query to generate a combined list of customers that includes duplicate customer records. Exercise 4: Write the SQL query to show the duplicate customer records only. Exercise 5: Write the SQL query to show only the records that are unique to the CUSTOMER 2 table. Exercise 6: Write the SQL query to show the invoice number, the customer number, the customer name, the invoice date, and the invoice amount for all customers with a customer balance of $700 or more. Exercise 7: Write the SQL query to show the invoice number, the invoice amount, the average invoice amount, and the difference between the average invoice amount and the actual invoice amount.

4 Question 3 (10 marks): ATTRIBUTE NAME SAMPLE VALUE SAMPLE VALUE SAMPLE VALUE SAMPLE VALUE SAMPLE VALUE INV_NUM PROD_NUM BB-T5434UW GF W YU X CC-77362PO GH K INV_DATE 1-NOV NOV NOV NOV NOV-2017 SALE_LABEL Rotary sander Rotary sander Power drill Band saw 0.35 in. drill bit VEND_CODE VEND_NAME Bunnings Gr. Bunnings Gr. Bunnings Gr. Masters Inc. Bunnings Gr. QUANT_SOLD PROD_PRICE $79.99 $79.99 $95.49 $45.99 $5.99 Using the above Invoice table structure, perform the followings: Write the relational schema for the above table, draw the dependency diagram, and identify all dependencies, including all partial and transitive dependencies. You may assume that an invoice number references more than one product and that the table does not contain repeating groups. (Hint: This table is based on a composite primary key.) Write the relational schemas after removing all partial dependencies and draw the new dependency diagrams. Identify the normal form for each created table structure. Write the relational schemas after removing all transitive dependencies and draw the new dependency diagrams. Identify the normal form for each created table structure. Exercise 4: Draw the Entity Relationship Diagram (ERD) according to the result of Exercise 3.

5 Question 4 (5 marks): You are given the following table structure with sample data in it. Student_ID Student_Name Major Course_ID Course_Title Instructor_Name Instructor_Location Grade Powell Eng ENG420 Instruments David B101 B Powell Eng ENG530 PLC Design Peter B117 A Anderson IT SIT772 Database Sys Jack T201 C Anderson IT SIT771 OOD Fred T212 A Anderson IT SIT773 Soft analysis Margarete T233 B Draw the dependency diagram of the table, and normalize the table to ensure all generated tables are in 3NF. Present all tables generated from the normalization. Write SQL code to create the generated tables..