3. The QR table records the workshop attendance of students. The BB table is a master table that holds student’s data in INFO151. The ZOOM table automatically records students who enter the workshop session with zoom. The requirements for each of the tables are listed in the requirement table below. (a) Write the DDL to create the tables with the suggested attributes, data types and constraints. (b) What is a composite key? Is the primary key in the BB table a composite key or a surrogate key? Must the last name be unique for this type of primary key? (c) Discuss the limitation of using FName and LName as the primary key. (d) Is the relationship between BB and QR tables a one-to-one? If it is not, state the correct relationship.
3. The QR table records the workshop attendance of students. The BB table is a master table that holds student’s data in INFO151. The ZOOM table automatically records students who enter the workshop session with zoom. The requirements for each of the tables are listed in the requirement table below. (a) Write the DDL to create the tables with the suggested attributes, data types and constraints. (b) What is a composite key? Is the primary key in the BB table a composite key or a surrogate key? Must the last name be unique for this type of primary key? (c) Discuss the limitation of using FName and LName as the primary key. (d) Is the relationship between BB and QR tables a one-to-one? If it is not, state the correct relationship.
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question
3. The QR table records the workshop attendance of students. The BB table is a master table that holds student’s data in INFO151. The ZOOM table automatically records students who enter the workshop session with zoom. The requirements for each of the tables are listed in the requirement table below.
(a) Write the DDL to create the tables with the suggested attributes, data types and constraints.
(b) What is a composite key? Is the primary key in the BB table a composite key or a surrogate key? Must the last name be unique for this type of primary key?
(c) Discuss the limitation of using FName and LName as the primary key.
(d) Is the relationship between BB and QR tables a one-to-one? If it is not, state the correct relationship.
Transcribed Image Text:BB
QR
Table Name and Data Types
SID
FName
LName
QID
FName
LName
DateTime_IN
Sid4
Mode
ZOOM
ZID
FName
LName
DateTime_IN
Date Time_OUT
Duration
INTEGER
TEXT
TEXT
INTEGER
TEXT
TEXT
TEXT
INTEGER
TEXT
INTEGER
TEXT
TEXT
TEXT
TEXT
INTEGER
Primary
Key
FName,
LName
QID
ZID
Foreign Key
None
FName,
LName
FName,
LName
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