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Assignment #3

Instruction for properly completing the assignment:

Due Sunday of Week 3 by 11:55 PM [5% of your grade]

  1. Download the attached template called “INFO620-Assignment3_LastNameFirst.doc”.
  2. Change the file name applying your Last Name and First Name in place of the LastNameFirst.
  3. Then open the newly saved file and enter your name and the date due on the top of the document.
  4. Then enter each problem’s solution within this same file in their proper locations WITHOUT changing or erasing the questions.
  5. Support your responses and answers by references from the text.
  6. Review and complete all questions.
  7. Then upload to Assignment #3 area of the Assignments.
  8. Your grade may be reduced if these instructions are NOT followed closely.

 

Week 3 Assignment Grading Rubric: 

#8.17 0.6 points #10.23a 0.2 points
#8.26 0.6 points #10.23b 0.3 points
#9.3 0.6 points #10.23c 0.3 points
#9.4 0.6 points #10.23d 0.3 points
#10.22 0.6 points #10.23e 0.3 points
#10.24 0.6 points    

 

Here are the contents of Assignment #3 (however – please use the template attached  – don’t copy and paste from here):

CH 8: THE ENHANCED ENTITY-RELATIONSHIP (EER) MODEL

#8.17 – Consider the BANK ER schema of Figure 7.21, and suppose that it is necessary to keep track of different types of ACCOUNTS (SAVINGS_ACCTS, CHECKING_ACCTS, …) and LOANS (CAR_LOANS, HOME_LOANS, …). Suppose that it is also desirable to keep track of each account’s TRANSACTIONs (deposits, withdrawals, checks, …) and each loan’s PAYMENTs; both of these include the amount, date, time, …  Modify the BANK schema, using ER and EER concepts of specialization and generalization. State any assumptions you make about the additional requirements. (You may use Visio)

#8.26 – Which of the following EER diagram(s) is/are incorrect and why? State clearly any assumptions you make. (refer to the diagrams in your text – they are not too clear here).

CH 9: RELATIONAL DATABASE DESIGN BY ER- AND EER-TO-RELATIONAL MAPPING

#9.3 – Try to map the relational schema of Figure 6.14 into an ER schema. This is part of a process known as reverse engineering, where a conceptual schema is created for an existing implemented database. State any assumptions you make.

#9.4 – Figure 9.8 shows an ER schema for a database that may be used to keep track of transport ships and their locations for maritime authorities. Map this schema into a relational schema, and specify all primary keys and foreign keys.

CH 10: PRACTICAL DATABASE DESIGN METHODOLOGY AND USE OF UML DIAGRAMS

#10.22 – What are the current relational DBMSs that dominate the market? Pick one that you are familiar with and show how it measures up based on the criteria laid out in Section 10.2.3?

#10.23 – A possible DDL corresponding to Figure 3.1 is shown below:

CREATE TABLE STUDENT (

NAME                             VARCHAR(30)       NOT NULL,

SSN                                 CHAR(9)                 PRIMARY KEY,

HOMEPHONE                VARCHAR(14),

ADDRESS                        VARCHAR(40),

OFFICEPHONE               VARCHAR(14),

AGE                                 INT,

GPA                                 DECIMAL(4,3)

);

 

Discuss the following detailed design decisions:

a.     The choice of requiring NAME to be NON NULL.

b.     Selection of SSN as the PRIMARY KEY.

c.     Choice of field sizes and precision.

d.     Any modification of the fields defined in this database.

e.     Any constraints on individual fields.

#10.24 – What naming conventions can you develop to help identify foreign keys more efficiently?

 
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