Use the ER Diagram shown on Figure 1 to answer question 9: 9. According to the ER diagram on Figure 1, which of the following is true? A) For each employee, we will keep track of either the employee name or the unique employee ID. B) For each department, we will keep track of either the unique department ID or the department location. C) Each employee reports to exactly one department. A department may have many employees reporting to it, but it does not have to have any. D) None of the above. Answer: EmplD EmpName EMPLOYEE Reports To DeptID DeptLocation DEPARTMENT

Use the ER Diagram shown on Figure 1 to answer question 9: 9. According to the ER diagram on Figure 1, which of the following is true? A) For each employee, we will keep track of either the employee name or the unique employee ID. B) For each department, we will keep track of either the unique department ID or the department location. C) Each employee reports to exactly one department. A department may have many employees reporting to it, but it does not have to have any. D) None of the above. Answer: EmplD EmpName EMPLOYEE Reports To DeptID DeptLocation DEPARTMENT

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Given the following case you are to answer the two questions on the following pages. Bob’s Supply (BS) needs to keep track of the parts they have in their inventory. He wants to know the description of each part, the color of each part, how many of each item is in stock [QOH], and how much each part costs him. BS also needs to keep track of who supplies each part, the supplier’s name, contact person, and telephone number. We know that each part in inventory has only one supplier, but some suppliers supply multiple parts to BS. Bob wants each part and each supplier to have assigned an identifying number. 1. Identify the tables needed to design the database and the fields [attributes] needed for each table and the role or function that some attrIbutes take on. 2. Create the database design for this case below using an Entity-Relationship Diagram.
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Design a database to store the marketing information that allows business users to generate the reports related to Activities, Campaigns, Programs and Cost for marketing purpose. For example, this database should provide the proper data if the business wants to find out the cost of each activity, list the activities for each campaign and Programs, etc. Here are the relationships between Activities, Campaigns, Programs, and Invoices: a.A Program may be related to one or multiple Campaigns. b. A Campaign may be related to one or more Programs. c.An Activity only belongs to one Campaign. d. One campaign can include many activities. e. An Invoice includes the cost for one activity. Each activity has its own invoice.
ALO (Anderson - left - overs.) Enterprises is an organization that provides a wide variety of service offerings for clients. Service types available include bookkeeping, computer installation, computer repair, software installation, taxes, advertising, market surveys, etc. Each service engagement may involve multiple types of service and may include multiple employees. Each type of service has a standard hourly billing rate and can not be entered into the database unless at least one of ALQ's employees is capable of performing that type of service. Employees are trained to perform multiple types of services and can work on multiple service engagements. Employees earn a contracted annual salary based on their credentials, regardless of what services they actually end up performing. Clients are required to pay for a given service engagement in full ( with just one check) within two weeks of the completion date. It is possible for a client to pay for more than one service engagement with…
b. Draw an Entity Relationship diagram from each of the following descriptions. Include the attributes, primary keys (underlines) and the relationships in the diagram (like relationship in Access). i. Each of the department has many employees assigned to it, but each employee works for only one department. if. A customer can rent many videotapes from the video store. Each of the videotapes can be rented to many customers.
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SQL Database In each step, represent your answer using the shorthand representation and a diagram. Adventure Tours is considering offering outdoor adventure classes to prepare people to participate in hiking, biking, and paddling adventures. Only one class is taught on any given day. Participants can enroll in one or more classes. Classes are taught by the guides that Adventure Tours employs. Participants do not know who the instructor for a particular class will be until the day of the class. a) For each participant, list his or her number, last name, first name, address, city, state, postal code, telephone number, and date of birth. b) For each adventure class, list the class number, class description, maximum number of people in the class, and class fee. c)For each participant, list his or her number, last name, first name, and the class number, class description, and date of the class for each class in which the participant is enrolled. d)For each class, list the class date,…
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Look at the 4 entities below and assume that customer_id is the key common to all tables. • Customer: An entity that describes a customer. An instance occurs for unique customers only using name, date of birth, and login name as customer_id primary key. • Online: An entity that describes a customer purchasing activity online. An instance occurs when the customer completes the transaction. Customers can purchase more than once. • Visits: An entity that describes a customer purchase in a physical store. An instance occurs if a customer makes or purchase or checks-in using an app. Customers can visit more than once per day. • Satisfaction: An entity that represents data from a recent customer satisfaction survey. An instance occurs when a customer takes the survey. A customer is tracked by login name and can only take the survey one time. Use the information to match the following relationships. Answers can be reused more than once. The relationship between Customer and Online The…