Modern Database Management (12th Edition)
12th Edition
ISBN: 9780133544619
Author: Jeffrey A. Hoffer, Ramesh Venkataraman, Heikki Topi
Publisher: PEARSON
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Chapter 5, Problem 5.41PAE
Program Plan Intro
Using indexes to access only records that satisfy the given qualification.
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Assume a university database's student table includes StudentID, Major, Age, MaritalStatus, and HomeZipCode indexes (all secondary keys). Assume the university wanted a list of MIS or computer science majors over 25 who were married and from 45462 OR computer engineering majors over 25 who were single. How can indexes guarantee only these records be accessed?
Assume a university database's student table has indexes on StudentID (the main key) and Major, Age, MaritalStatus, and HomeZipCode (all secondary keys) (all secondary keys). Imagine the university requested a list of students majoring in MIS or computer science who were over the age of 25, married, and from the 45462 zip code OR students majoring in computer engineering who were single and from the 45462 zip code. How can indexes be used to restrict results to to those records that fulfill this condition?
You are asked to design a database for an University. This particular university has multiple departments. Each department in that university offers one or more courses to the students. All the students are part of a certain department and they take courses in that department. A department has a name, unique number and chairman. The courses have a name, a course number such as ‘311’ , a credit point value, and the year it commenced. A course cannot be identified uniquely with the course number, but the course number is unique for each department. Students have given names, surname, unique Student ID, Date of Birth and the year they enrolled. When a student takes a course the year and the semester he or she took that particular course is recorded. When he finishes the course , the grade and total marks are recorded. A student can take multiple courses but they are also allowed to drop a semester in that university by taking no courses. Construct an ER diagram using the requirements…
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...
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