[해답]데이터베이스 시스템 5판 해답 Ramez Elmasri
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completed.
(d) (Update) Insert a new student in the database whose Name=Jackson,
출판사 & 저자 : Ramez Elmasri
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1.11 Give some additional views that may be needed by other user groups for the
Answer:
1.10 Name all the relationships among the records of the database shown in Figure 1.2.
Redundancy is when the same fact is stored multiple times in several places in a
(b) (Query) What are the prerequisites of the Database course?.
(a) A view that groups all the students who took each section and gives each students
(a) (Query) List the names of all students majoring in Computer Science.
(e) (Update) Change the grade that Smith received in Intro to Computer Science section
ensure that StudentName=Smith in that record. If the DBMS has no control over this, we
database shown in Figure 1.2.
database. For example, in Figure 1.5(a) the fact that the name of the student with
순서
데이터베이스,솔루션,시스템,5판
record.
(a) Each SECTION record is related to a COURSE record.
(c) (Query) Retrieve the transcript of Smith. This is a list of 설명
have uncontrolled redundancy.
CHAPTER 1: DATABASES AND DATABASE USERS
StudentNumber=23, Class=1 (freshman), and Major=MATH.
Answer:
[해답]데이터베이스 시스템 5판 해답 Ramez Elmasri
레포트 > 공학,기술계열
SectionIdentifier, Semester, Year, Grade> for each course section that Smith has
record with StudentNumber=8 is stored in the database of Figure 1.5(a), the DBMS will
(b) Each GRADE_REPORT record is related to one STUDENT record and one SECTION
1.9 What is the difference between controlled and uncontrolled redundancy?
Answer:
Answers to Selected Exercises
and the other in the role of a prerequisite to that course.
1.8 Give some informal queries and update operations that you would expect to apply to the
119 to B.
Answer:
Download : 데이터베이스시스템5판(저자_ramez.zip( 36 )
다.
StudentNumber=8 is Brown is stored multiple times. Redundancy is controlled when the
DBMS ensures that multiple copies of the same data are consistent; for example, if a new
database shown in Figure 1.2.
(c) Each PREREQUISITE record relates two COURSE records: one in the role of a course
참고 :
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