Modern Database Management (12th Edition)
12th Edition
ISBN: 9780133544619
Author: Jeffrey A. Hoffer, Ramesh Venkataraman, Heikki Topi
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 5, Problem 5.32PAE
Suppose you are designing a default value for the age field in a student record at your university. What possible values would you consider, and why? How might the default vary by other characteristics about the student, such as school within the university or degree sought?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The attribute AGE is calculated from
DATE OF BIRTH. The attribute AGE is:
A Single valued.
B Multivalued.
C Derived.
D Composite.
Consider the following Table for the entity ENROLL:
CLASS_CODE
CLASS_NAME
STU_NUM
STU_NAME
ATTENDANCE
ENROLL_GRADE
10014
INFO3233-01
321452
Jan Jones
30/35 Classes
C
10014
INFO3233-01
324257
Tom Poole
25/35 Classes
B
10018
INFO3234-01
321452
Jan Jones
35/35 Classes
A
10018
INFO3234-01
324257
Tom Poole
30/35 Classes
B
10021
INFO3236-01
321452
Jan Jones
35/35 Classes
C
10021
INFO3236-01
324257
Tom Poole
20/35 Classes
C
Is [CLASS_CODE, CLASS_NAME, STU_NUM, STU_NAME] a Superkey? Why?
Is [CLASS_CODE, CLASS_NAME, STU_NUM] a Superkey? Why?
Is [CLASS_CODE, CLASS_NAME, STU_NUM] a Candidate Key? Why?
Is [CLASS_CODE, STU_NUM] a Candidate Key? Why?
Please label your answers (for #1, 2, 3, or 4) clearly.
Look up the average evaluation score earned by instructor Egan for the Emergency Care course:
In cell E14, begin to enter a formula using the XLOOKUP
Use the instructor name in cell E12 as the value to look up.
Use a structured reference to the header row of the Evaluations table as the table to search.
Return the value in the range E4:I4.
I need help with the sttructured reference refered in #3
Chapter 5 Solutions
Modern Database Management (12th Edition)
Ch. 5 - Prob. 5.1RQCh. 5 - Prob. 5.2RQCh. 5 - Prob. 5.3RQCh. 5 - Prob. 5.4RQCh. 5 - Prob. 5.5RQCh. 5 - Prob. 5.6RQCh. 5 - Prob. 5.7RQCh. 5 - Prob. 5.8RQCh. 5 - Explain why you sometimes have to reserve much...Ch. 5 - Why are field values sometimes coded?
Ch. 5 - Prob. 5.11RQCh. 5 - Prob. 5.12RQCh. 5 - Explain why normalized relations may not comprise...Ch. 5 - Prob. 5.14RQCh. 5 - List three common situations that suggest that...Ch. 5 - Explain the reasons why some experts are against...Ch. 5 - Prob. 5.17RQCh. 5 - Prob. 5.18RQCh. 5 - Prob. 5.19RQCh. 5 - Prob. 5.20RQCh. 5 - Prob. 5.21RQCh. 5 - State nine rules of thumb for choosing indexes.Ch. 5 - One of the strongest recommendations regarding...Ch. 5 - Explain why an index is useful only if there is...Ch. 5 - Indexing can clearly be very beneficial. Why...Ch. 5 - Consider the following two relations for...Ch. 5 - Prob. 5.28PAECh. 5 - Prob. 5.29PAECh. 5 - Prob. 5.30PAECh. 5 - Prob. 5.31PAECh. 5 - Suppose you are designing a default value for the...Ch. 5 - When a student has not chosen a major at a...Ch. 5 - Prob. 5.34PAECh. 5 - Prob. 5.35PAECh. 5 - Consider the relations in Problem and Exercise...Ch. 5 - Prob. 5.37PAECh. 5 - Prob. 5.38PAECh. 5 - Prob. 5.39PAECh. 5 - Prob. 5.40PAECh. 5 - Prob. 5.41PAECh. 5 - Consider the relations specified in Problem and...Ch. 5 - Prob. 5.43PAECh. 5 - Prob. 5.44PAECh. 5 - Prob. 5.45PAECh. 5 - Prob. 5.46PAECh. 5 - Prob. 5.47PAECh. 5 - Problems and Exercises 8-65 through 8-68 refer to...Ch. 5 - Refer to the large Pine Valley Furniture Company...Ch. 5 - Problems and Exercises 8-65i5 through 8-68 refer...Ch. 5 - Refer to Figure 4-5 0. For each of the following...
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
- The Data type involves which four objectives?arrow_forwardConsider these factors while determining the sentinel value you want to use.arrow_forwardin a shop ,there are 10 employee and 20 kinds of goods，goods id between 1-20 EMPLOYEE id first name last name gender 10001, 'Tom', 'Brown', 'F'10002, 'Elizabeth', 'Tremblay', 'F'10003, 'Gladys', 'Julie', 'F10004, 'John', 'Taylor', 'M10005, 'Amelia', 'Smith'10006, 'Logan', 'Katherine'10007, 'Leo', 'Brown'10007, 'Lem', 'Thompson'10009, 'Tom' 'Smith'10010, 'Emma', 'Campbell' ------------ and I want to add a name library in it ,like this how could i create a HTML file ,with will randomly create customers with these employee . there is a start button on the page . press "start "bottom ,and it will It will randomly match 10 items, customers, and goods, display goods id ,customername and gender ,employer name , id and gender . how to do such a page ?arrow_forward
- Does it make a difference whether you use composite attributes or composite keys to determine if you are allowed to utilise composite keys?arrow_forwardA travel company would like to analyze its data in order to plan better promotional campaigns with its customers. More specifically, she would like to analyze the number and number of sales based on: ✓ Destination: hotel, city, country, region, region category (example: seaside, alpine. etc.), destination category (example: family or not), hotel category (ex: 1-4 stars); ✓ Date of purchase: day of the year, day of the week, month, year, tourist season (eg: low or high season); ✓Client: age group, sex, address, type of buyer (eg: new, recurring, etc.); 1. Provide a star schema which will allow the company to do these analyzes 2. Clearly identify the primary and foreign keys of fact and dimension tables; 3. Identify, for each dimension table, a hierarchy of levels of granularity (e.g.. attribute! attribute2...);arrow_forwardA parameter comes from where while a statistic comes from where?arrow_forward
- An insurance company needs to store their salespeople’s information who are selling their insurance policies. They already have a database with multiple tables, one of the tables (Salesperson) stores information about each salesperson along with the bonus percent they receive, based on the city where the insurance is sold. The table has the following fields: Salesperson(spID, spName, spBirthDate,spCitySelling, bonusPercent) spID: Unique identification number of the salesperson. spName: Full name of the salesperson. spBirthDate: Birthdate of the salesperson. spCitySelling: The city in which the salesperson is selling the insurance. bonusPercent: The bonus percent received by the salesperson based on the city in which he/she sells the insurance. Each salesperson can sell the insurance in just one city. However, for a city, there can be more than one salesperson appointed. Also, the bonus percent is fixed for each city. For example, all of the salespeople who sells insurance in…arrow_forwardDoes it make a difference whether you use composite attributes or composite keys to determine if you are allowed to utilize composite keys?arrow_forwardIf a field's data type is chosen carefully, can its security be managed?arrow_forward
- Consider the following ERD; consider additional attributes if needed Write relational algebra expressions on following: 1) Find the test details that has performed on patient 'Arisha' 2) Find the total test amount of patient 'Nishant'. a) Find the doctors details with dss='d01' with list of his patients insurance date-admitted name date-checked-out ss# patients test-log Dr-Patient test_id performed by doctors test dss# specialization name test_name date time resultarrow_forward1. The data type for Borrower_name in Borrowers Table is: A. Short text C. Currency B. Long text D. Yes/No Borrowers Field Name Borrower ID Borrower Name Phone num Membership_activation Data Type AutoNumber Short Text Short Text Yes/Noarrow_forwardA rail transport company wishes to hold details of train services, stations and operators. Details include the following: Trains: A train has a unique id code, a collection of days it runs on (Monday, Sunday etc.), and the number of carriages it has. Each train must have at least one driver but can have many drivers that can drive it, and a driver may drive many trains. Each driver is identified by an employee number and a name. A train is designated as either an InterCity or District train though other types of train are possible. Each train must have an operator and not more than one operator. Each operator has a name and a phone number. The operator can operate many trains (or none at all!) Stations: A station has a name and the number of platforms it has. All stations are classified as either Main or District only. There are no other types of stations. Timetable: A train has a number of stops at a station during its journey. It never visits the same station twice on the same…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Np Ms Office 365/Excel 2016 I NtermedComputer ScienceISBN:9781337508841Author:CareyPublisher:Cengage
Np Ms Office 365/Excel 2016 I Ntermed
Computer Science
ISBN:9781337508841
Author:Carey
Publisher:Cengage
dml in sql with examples; Author: Education 4u;https://www.youtube.com/watch?v=WvOseanUdk4;License: Standard YouTube License, CC-BY