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