Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Expert Solution & Answer
thumb_up100%
Chapter 1, Problem 6HOA
Explanation of Solution
Entity Relationship model
- An entity-relationship model describes interrelated things of interest in a specific domain of knowledge.
- It is composed of entity types and specifie...
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
A college course may have one or more scheduled sections or may not have a scheduled section. Attributes of COURSE include Course ID, Course Name, and Units. Attributes of SECTION include Section Number and Semester ID. Semester ID is composed of two parts: Semester and Year. Section Number is an integer (such as 1 or 2) that distinguishes one section from another for the same course but does not uniquely identify a section. How did you model SECTION? Why did you choose this way versus alternative ways to model SECTION?
When building a data model, why is it sometimes preferable to
leave out certain information?
When building a data model, why is it sometimes preferable to not include a certain piece of information?
Chapter 1 Solutions
Oracle 12c: SQL
Ch. 1 - Prob. 1RQCh. 1 - Prob. 2RQCh. 1 - Prob. 3RQCh. 1 - Prob. 4RQCh. 1 - Discuss the problems that can be caused by data...Ch. 1 - Explain the role of a primary key.Ch. 1 - Prob. 7RQCh. 1 - Prob. 8RQCh. 1 - What type of relationship can’t be stored in a...Ch. 1 - Identify at least three reasons an organization...
Ch. 1 - Prob. 1MCCh. 1 - Prob. 2MCCh. 1 - Prob. 3MCCh. 1 - Prob. 4MCCh. 1 - Prob. 5MCCh. 1 - Prob. 6MCCh. 1 - Prob. 7MCCh. 1 - Which of the following has no partial or...Ch. 1 - Prob. 9MCCh. 1 - Which of the following has no partial dependencies...Ch. 1 - Which of the following has no repeating groups but...Ch. 1 - Prob. 12MCCh. 1 - Prob. 13MCCh. 1 - A unique identifier for a data row that consists...Ch. 1 - Which of the following symbols represents an...Ch. 1 - Prob. 16MCCh. 1 - Which of the following represents a field in a...Ch. 1 - Which of the following defines a relationship in...Ch. 1 - When part of the data in a table depends on a...Ch. 1 - Which of the following is used to join data...Ch. 1 - Which tables and fields would you access to...Ch. 1 - Prob. 2HOACh. 1 - Prob. 3HOACh. 1 - Prob. 4HOACh. 1 - Access path A database table is composed of...Ch. 1 - Prob. 6HOACh. 1 - Prob. 7HOACh. 1 - Prob. 8HOACh. 1 - Prob. 9HOACh. 1 - Prob. 10HOA
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- When starting a data modeling project, what are the main differences between using an existing model and starting from scratch?arrow_forwardWhen building a data model, what is the purpose of excluding some data items?arrow_forwardIf a data item is not to be included in a data model, why is this the case?arrow_forward
- How come a data item isn't part of the model?arrow_forwardIf a data item is expected to be included in a data model, why is it absent?arrow_forwardQuestion 3 Draw a detailed activity Diagram in draw.io and screenshot it for me. ( **Please take note is a detailed activity diagram) Scenario The exam unit uses the system after the subject registration period has closed. The system will display a list of subjects that have registered students. Using this list, the exam unit will plan out examination week. Examination week lasts 6 days, from Monday to Saturday. For each day, the exam unit will assign a subject to that day. Each day can have a total of 6 examination hours with subjects having 2- hour or 3-hour examinations. For example, if the subjects are 2-hour examinations, then 3 of them can be scheduled for the day and if the subjects are 3-hour examinations, then only 2 of them can be scheduled for the day. There can also be a mixture of 2-hour and 3-hour examinations. If the exam unit schedules too many examination hours for that day then the day resets and the exam unit needs to reschedule again. This process stops when…arrow_forward
- Draw an E-R diagram for each of the descriptions below. Q -An architectural design firm has a number of design projects underway at any point in time. Each of these projects is identified by a unique project identification code. Additional data stored for each project includes a description, a target completion date, and a dollar budget amount. Design associates staff these projects. These associates include architects, engineers, and computer CAD (Computer-Aided Design) specialists. Each associate is identified by a unique code. Other information about associates includes their name, specialty, their level. There are three levels of associates (gold, silver, and bronze). The bronze associates report to one and only one silver associate (who typically has at least one bronze associates reporting to her), and the silver associate reports to a gold associate in the same fashion. Each project staffed by at least one associate staff. It is also common to find any particular associate…arrow_forwardWhat actions can you take to make sure your model has all the data it needs? How may problem statements benefit from data modeling techniques?arrow_forwardInstructions: Create a dimensional model for a particular business process involving gym membership. A customer can sign up for a membership of say one, three, six or twelve months. I want to make it easy to query to identify current members, members who expired in the last month, members who renewed in the last month, those who are pending expiry etc. If I have a basic model with a fact table representing a gym membership say start_date_key end_date_key membership_attribute_key customer_atrribute_key fee with associated dimension table for date, membership attributes such as length, customer attributes and so forth. On a particular day, the active members are those with a start date before the day and an end date after that day. Those who will expire next month are those where the end date is in a particular date range.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Information Systems (MindTap Course...Computer ScienceISBN:9781285867168Author:Ralph Stair, George ReynoldsPublisher:Cengage Learning
A Guide to SQLComputer ScienceISBN:9781111527273Author:Philip J. PrattPublisher:Course Technology Ptr
Principles of Information Systems (MindTap Course...Computer ScienceISBN:9781305971776Author:Ralph Stair, George ReynoldsPublisher:Cengage Learning
Np Ms Office 365/Excel 2016 I NtermedComputer ScienceISBN:9781337508841Author:CareyPublisher:Cengage
Principles of Information Systems (MindTap Course...
Computer Science
ISBN:9781285867168
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
A Guide to SQL
Computer Science
ISBN:9781111527273
Author:Philip J. Pratt
Publisher:Course Technology Ptr
Principles of Information Systems (MindTap Course...
Computer Science
ISBN:9781305971776
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
Np Ms Office 365/Excel 2016 I Ntermed
Computer Science
ISBN:9781337508841
Author:Carey
Publisher:Cengage