A list consists of last names, first names, addresses, and pin codes if all people in the list have the same last and the same pin code, a useful key would be

Introduction to Database System
A list consists of last names, first names, addresses, and pin codes if all people in the list have the same last and the same pin code, a useful key would be

a compound key consisting of the first name and the last name

the last name

All of these

the pin code

None of these

a compound key consisting of the first name and the last name

the last name

All of these

the pin code

None of these

ANSWER DOWNLOAD EXAMIANS APP

Introduction to Database System
A scheme describes

record relationships

None of these

records and files

All of these

data elements

record relationships

None of these

records and files

All of these

data elements

ANSWER DOWNLOAD EXAMIANS APP

Introduction to Database System
If the record management system allows you to edit values before they are recorded on disk, you can

correct spelling changes before they are recorded

change the width of a field

All of the listed here

change the name of a field

correct spelling changes before they are recorded

change the width of a field

All of the listed here

change the name of a field

ANSWER DOWNLOAD EXAMIANS APP

Introduction to Database System
The activity of a file

refers to how closely the files fits into the allocated

None of these

is a measure of the percentage of existing records updated during a run

if high, reduces processing efficiency for sequential and nonsequential files

is a low percentages of number of records added or deleted from a file

refers to how closely the files fits into the allocated

None of these

is a measure of the percentage of existing records updated during a run

if high, reduces processing efficiency for sequential and nonsequential files

is a low percentages of number of records added or deleted from a file

ANSWER DOWNLOAD EXAMIANS APP

Introduction to Database System
The modify operation is likely to be done after

Delete

Look-up

None of these

All of these

Insert

Delete

Look-up

None of these

All of these

Insert

ANSWER DOWNLOAD EXAMIANS APP

Introduction to Database System
In SQL, which command is used to add a column/integrity constraint to a table

INSERT COLUMN

MODIFY TABLE

ADD COLUMN

ALTER TABLE

INSERT COLUMN

MODIFY TABLE

ADD COLUMN

ALTER TABLE

ANSWER DOWNLOAD EXAMIANS APP

Introduction to Database System

Introduction to Database System A list consists of last names, first names, addresses, and pin codes if all people in the list have the same last and the same pin code, a useful key would be

Introduction to Database System A scheme describes

Introduction to Database System If the record management system allows you to edit values before they are recorded on disk, you can

Introduction to Database System The activity of a file

Introduction to Database System The modify operation is likely to be done after

Introduction to Database System In SQL, which command is used to add a column/integrity constraint to a table

Introduction to Database System
A list consists of last names, first names, addresses, and pin codes if all people in the list have the same last and the same pin code, a useful key would be

Introduction to Database System
A scheme describes

Introduction to Database System
If the record management system allows you to edit values before they are recorded on disk, you can

Introduction to Database System
The activity of a file

Introduction to Database System
The modify operation is likely to be done after

Introduction to Database System
In SQL, which command is used to add a column/integrity constraint to a table