Modern Database Management
13th Edition
ISBN: 9780134773650
Author: Hoffer
Publisher: PEARSON
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Chapter 8, Problem 8.61PAE
Program Plan Intro
Indexes for the given
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How to make a Crow's Foot ERD for the following: A company has a number of employees. The attributes of EMPLOYEE include Name, Address, and Birth-date. The company also has several projects. The attributes of Project include Project_Code, Description, and Start_date. Each employee may be assigned to one or more projects, or may not be assigned to any project. A project is required to have at least one employee assigned, but may have several employees assigned.
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Chapter 8 Solutions
Modern Database Management
Ch. 8 - Prob. 8.1RQCh. 8 - Prob. 8.2RQCh. 8 - Prob. 8.3RQCh. 8 - Prob. 8.4RQCh. 8 - Prob. 8.5RQCh. 8 - Prob. 8.6RQCh. 8 - Prob. 8.7RQCh. 8 - Prob. 8.8RQCh. 8 - Explain why you sometimes have to reserve much...Ch. 8 - Why are field values sometimes coded?
Ch. 8 - Prob. 8.11RQCh. 8 - Prob. 8.12RQCh. 8 - Explain why normalized relations may not comprise...Ch. 8 - Prob. 8.14RQCh. 8 - List three common situations that suggest that...Ch. 8 - Explain the reasons why some experts are against...Ch. 8 - Prob. 8.17RQCh. 8 - Prob. 8.18RQCh. 8 - Prob. 8.19RQCh. 8 - Prob. 8.20RQCh. 8 - Prob. 8.21RQCh. 8 - Prob. 8.22RQCh. 8 - One of the strongest recommendations regarding...Ch. 8 - Explain why an index is useful only if there is...Ch. 8 - Indexing can clearly be very beneficial. Why...Ch. 8 - Prob. 8.26RQCh. 8 - Prob. 8.27RQCh. 8 - Describe the role of data dictionary in the...Ch. 8 - Prob. 8.29RQCh. 8 - Prob. 8.30RQCh. 8 - Explain how creating a view may increase data...Ch. 8 - Prob. 8.32RQCh. 8 - Prob. 8.33RQCh. 8 - Prob. 8.34RQCh. 8 - Prob. 8.35RQCh. 8 - Prob. 8.36RQCh. 8 - Prob. 8.37RQCh. 8 - Prob. 8.38RQCh. 8 - Prob. 8.39RQCh. 8 - How can views be used as part of data security?...Ch. 8 - Prob. 8.41RQCh. 8 - Prob. 8.42RQCh. 8 - Consider the following two relations for...Ch. 8 - Prob. 8.44PAECh. 8 - Prob. 8.45PAECh. 8 - Prob. 8.46PAECh. 8 - Prob. 8.47PAECh. 8 - Suppose you are designing a default value for the...Ch. 8 - When a student has not chosen a major at a...Ch. 8 - Prob. 8.50PAECh. 8 - Prob. 8.51PAECh. 8 - Consider the relations in Problem and Exercise...Ch. 8 - Prob. 8.53PAECh. 8 - Prob. 8.54PAECh. 8 - Prob. 8.55PAECh. 8 - Prob. 8.56PAECh. 8 - Prob. 8.57PAECh. 8 - Consider the relations specified in Problem and...Ch. 8 - Prob. 8.59PAECh. 8 - Prob. 8.60PAECh. 8 - Prob. 8.61PAECh. 8 - Prob. 8.62PAECh. 8 - Prob. 8.63PAECh. 8 - Prob. 8.64PAECh. 8 - Problems and Exercises 8-65 through 8-68 refer to...Ch. 8 - Prob. 8.66PAECh. 8 - Problems and Exercises 8-65i5 through 8-68 refer...Ch. 8 - Refer to Figure 4-5 0. For each of the following...Ch. 8 - Prob. 8.69PAECh. 8 - Prob. 8.70PAECh. 8 - Prob. 8.71PAECh. 8 - Prob. 8.72PAECh. 8 - Prob. 8.73PAECh. 8 - Prob. 8.74PAECh. 8 - Prob. 8.75PAECh. 8 - Prob. 8.76PAECh. 8 - Prob. 8.77PAE
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- The company is organized intoDEPARTMENTs. Each department has a name, number and an employee who manages the department.Each department controls a number of PROJECTs. Each project has a name, number and is located at a single location.We store each EMPLOYEE's social security number, address, salary, sex, and birthdate. Each employee works for one department but may work on several projects. ER diagram??arrow_forwardA company has a number of employees. The attributes of FEMPLOYEE include Employee io (identifier), Name, Address, and Birthdate. The company also has several prolects. Attributes of (PROJECT include Project ID (identfier), Project Name, and Start Date. Each employee maybeassigned tp one or more projects or may not be assigned to a project. A project must have at least one emplovee assigned and may have any number of employees assigned. An employee's billing rate may vary by project, and the company wishes to record the applicable billing rate (Billing Rate) for each employee when assigned to a particular project. A). Draw ER Model For the companyB). Do the attribute names in this description follow the guidelines for naming attributes? If not, suggest better names.C). do you have any associative entities on your ERD? If so, what are the identifers for those associative entities?arrow_forwardA company has a number of employees. The attributes of FEMPLOYEE include Employee io (identifier), Name, Address, and Birthdate. The company also has several prolects. Attributes of (PROJECT include Project ID (identfier), Project Name, and Start Date. Each employee maybeassigned tp one or more projects or may not be assigned to a project. A project must have at least one emplovee assigned and may have any number of employees assigned. An employee's billing rate may vary by project, and the company wishes to record the applicable billing rate (Billing Rate) for each employee when assigned to a particular project. A. Draw ER Model For the company B. Do the attribute names in this description follow the guidelines for naming attributes? If not, suggest better names. C. to youhave any associative entities on your ERD? If so, what are the identifers for those associative entities?arrow_forward
- Design the Entity Relationship Diagram (ERD) showing entities, attributes, primary key and relationship cardinality for the following scenario. Any employee works for only a department and under supervision of a manager (where manager is also an employee). Employee's address, city code & city name also has been recorded. Every employee may work for multiple project, but an employee may be on vacation and not assigned to any projects. Working hour may be different for an employee for different projects. Projects are broken into tasks; A task is created for one project and assigned to one department. Requisitions are made for projects; Each requisition could ask for any number of items; Items could be: equipment item or materials item and are coded in a similar way; Each requisition is for one project and is made to one supplier. The important data fields are employee_id, employee_name ,employee_address, employee_email, department_id, department_name, location, city_code, city_name,…arrow_forwardOur criteria must be broad and consistent to have any value.arrow_forwardComputer Science THREE TABLES: 1. PROJECT WORKER_TABLE COLUMNS leavedate, worker_id, joindate, project_id, performance 2. PROJECTS TABLE COLUMNS projectid, project_name, capacity, startdate 3. WORKERS table COLUMNS worker_id, worker_name, gender, companyjoindate, birthdate, birthday, supervisory_id USE MYSQL TO ANSWER QUESTION BELOW Q: Find the ID and name of the project(s) that have a gender ratio of greater than one[Gender ratio = #of females/# of males]arrow_forward
- a. What normal form is this table? Give your reason. b. Identify the primary keys for the table c. Illustrate/draw the dependency diagram d. Normalize the table into 3NF and show all the steps involved in order for you to reach your answer.arrow_forwardPlease elaborate on the requirement engineering processes of elicitation, specification, and validation. Test out a few different approaches to collecting criteria.arrow_forwardPerform the following activities as part of the assignment • Read the case study at the end of Chapter 5, (which I will include below). You should use the 4 questions for the case study as a guide to the following: • Add new resort use case • Add book reservation use case • Activity diagrams • Sequence diagrams CRUD analysis. • Remember tables and diagrams always need a narrative to elaborate on them. This is what makes your document a narrative business document and not just a list of facts and ideas. Here is the case study. The Spring Breaks 'R' Us Travel Service The SBRU information system includes four subsys- they only plan to provide some design specifications and tems: Resort relations, Student booking, Accounting guidelines to each resort. The resort will be responsible and finance, and Social networking. The first three for connecting to the Internet and for providing a secur are purely Web applications, so access to those occurs wireless environment for the students.…arrow_forward
- Entity, relationship, and attribute names and definitions should all be correct.arrow_forwardIn conducting the Design Phase, which of the following tasks must be conducted first? a. Normalize the tables. b. Create an Entity Relationship Diagram. c. Review the system requirements. d. Design the user interface.arrow_forwardEntity Relationship Diagram Can you make changes because I think I made some mistakes while working on these entitties and implement the relationships of this ERD? (see attached photo)arrow_forward
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