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Introduction to Database System

Introduction to Database System
In SQL, which command is used to make permanent changes made by statements issue since the beginning of a transaction?

SAVE
PACK
ZIP
COMMIT

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Introduction to Database System
A compound key

None of these
is made up a several pieces of information
is a combination of each unique key
uniquely identifies an item in a list
both (a) and (b)

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Introduction to Database System
If a calculation is embedded in a form

the result of the calculations are stored with the form
the result of the calculations are printed in report
the calculations are stored with the form
all of the listed here

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Introduction to Database System
1:1, 1:N and N:M relationships are also known as HAS-A relationships.

True
False

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Introduction to Database System
An entity class is a collection of entities and is described by the structure of the entities in that class.

False
True

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Introduction to Database System
Queries to a database

both (a) and (b)
All of these
None of these
can use aggregate functions like SUM and COUNT
are written in English

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