CIS 207 Database Design and SQL HOMEWORK: # 1

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1 Name: Exercises refer to the Try It / Solve It exercises of the Database Design Sections 2 & 3 in Oracle ilearning. These are found in Sections in ilearning. 1. Section 2, Practice Activities DD Lesson 1, # 2 2. Review the scenario below. Identify the conceptual model and the physical model from the scenario. Zoe was about to go into a store to purchase drinks for the birthday party scheduled for that evening. Zoe knows that she needs drinks for 48 people and is expecting the store to accept a check for payment and to provide her with some assistance carrying the product to her car. Zoe wants to have carbonated drinks, non-carbonated drinks, and sugar free drinks. She is expecting to purchase eight six-packs. Zoe enters the store and discovers the entire drink distribution system is automated. She also discovers that the drinks come in varying package sizes and that she must choose the correct vending option for the products to be disbursed. Drinks are packaged in four-packs, six-packs, and ten-packs. 2. Section 2, Practice Activities DD Lesson 2, # 2, 4, 5, 7 2. Think about the last time you went to get a haircut, permanent, manicure, or other service from a barbershop or hair salon. Discuss the business of a barbershop or hair salon. Name the entities that are the main things about this business. Give examples of instances for each entity.

2 4. The goal of this practice is to recognize attributes for an entity. These three entities SONG, EVENT, and CUSTOMER play a role in a DJ business and are listed as the first three column headings in the table below. The fourth column contains a list of attributes. Use an X or a check mark to indicate that the attribute could belong to one or more of the entities listed. For example, could Title be an attribute for Song, for Event, and/or for Customer? Song Event Customer Title Description Venue First Name Phone Number Release date Last Name Type address 5. For each entity, select the attribute that could be the unique identifier of each entity. Entity: STUDENT Attributes: student id, first name, last name, address Entity: MOVIE Attributes: title, date released, producer, director Entity: LOCKER Attributes: size, location, number 8. Identify the business rules contained in the following scenario. We have many customers. We rent videos only to people who have joined our video club. To belong to our club, individuals must have good credit. For each club member, we d like to keep his first and last name, current phone number, and current address. And, of course, each club member has a membership number. Then we need to keep track of what movie each customer currently has checked out. A customer may check out multiple videos at any given time. We just track current rentals. We don t keep track of any rental histories.

3 7. Age is an example of what type of attribute? 3. Section 2, Practice Activities DD Lesson 3, # 3 3. List four goals of entity relationship modeling. 4. Section 3, Practice Activities DD Lesson 1, # 1, 3 1. Read the given business scenario. Name the relationships between EMPLOYEE and JOB. Include the appropriate optionality and cardinality. We have a lot of employees who handle one or more different jobs. We d like to keep track of who is working on which job. Although employees can help each other, a job is assigned to one employee and is the ultimate responsibility of that employee. All of our employees have at least one job. However, jobs exist that are not yet assigned to anyone. 3. Read the given business scenario. Name the relationships between PARENT and CHILD. Include the appropriate optionality and cardinality. At the end of each day, parents need to pick up their children at our day-care center. All children must be picked up by 6 p.m. A child may have two parents, but we need only one of them to come and pick up the child. We cannot release a child to anyone but that child s parent. 5. Section 3, Practice Activities DD Lesson 2, # 1, 3 1. Read the given business scenario. Draw the entities HAIRSTYLIST and CLIENT. List the attributes associated with each entity and specify whether they are mandatory or optional. Identify the UIDs. Write out the relationship in English, including optionality and cardinality. Follow the diagramming conventions discussed.

4 In our salon, we have a number of hairstylists. They are all salaried employees, so we keep a record of their first name, last name, address, phone number, social-security number, and salary. During the course of a day, a hairstylist may see several clients. On a slow day, a hairstylist may not work on anyone at all. We have several walk-in clients, and they each get assigned to one hairstylist. We just ask for their first name. We also have customers who call to make an appointment. When they do this, we ask for their first name, last name, and phone number. We also ask if they would like a specific hairstylist. If they have no preference, we assign one for them. Of course, they are allowed to switch to another hairstylist for their next visit to the salon. We are interested in tracking the daily appointments -- which stylist works on which client during a given day. 3. Read the given business scenario. Draw the entities TEACHER and COURSE and CLASS. List the attributes underneath each entity. Specify whether they are mandatory or optional. Identify the UIDs. Write out the relationship in English, including optionality and cardinality. We have several teachers at our school. A teacher can be assigned up to three classes per semester. If a teacher is on sabbatical, he doesn t teach that semester. We keep a record of the teacher s first name, last name, address, phone number, and address. Our school offers many courses -- such as Data Modeling, Introduction to SQL, Trigonometry, Physics, and Biology. Each course has a code. For example: Data Modeling would be DM001, Trigonometry would be TR004, etc. During each semester, a course may be taught in several classes -- so there could be two classes of Physics, three classes of Biology, etc. Each class can be taught by only one teacher. We assign a unique ID for each class, and we also keep track of the day it is taught, the time, and the classroom. 6. Section 3, Practice Activities DD Lesson 3, #1, 2, 3, 4 1. The goal of this practice is to read a relationship. Which text corresponds to the diagram? EMPLOYEE Assigned to Responsible for DEPARTMENT

5 a. Each EMPLOYEE may be assigned to one or more DEPARTMENTs. Each DEPARTMENT must be responsible for one or more EMPLOYEEs. b. Each EMPLOYEE must be assigned to one and only one DEPARTMENT. Each DEPARTMENT must be responsible for one or more EMPLOYEEs. c. Each EMPLOYEE must be assigned to exactly one DEPARTMENT. Each DEPARTMENT may be responsible for exactly one EMPLOYEE 2. In the diagram for #1 identify the symbols for cardinality. 3. In the diagram for #1 identify the symbols for optionality. 4. Read the relationship in the diagram below. Write the ERD statement for the relationship. CAMERA Used to take with Taken withr PHOTOGRAPHY 7. Section 3, Practice Activities DD Lesson 4, #2 2. Complete the matrix diagram below, and construct an ERD from it Runner City For Race Race Type Running Event Runner City For Race Race type Running Event

6 Submit the completed lab assignment document in Assignments in Canvas. Lab_1.doc 1/18/16