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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?

ZIP
SAVE
PACK
COMMIT

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Introduction to Database System
An identifier determines the type of relationship that an entity has.

True
False

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Introduction to Database System
An attribute that names or identifies entity instances is a(n):

relationship.
entity.
identifier.
attribute.

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Introduction to Database System
Because it contains a description of its own structure, a database is considered to be ________ .

self-describing
described
an application program
metadata compatible

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Introduction to Database System
In SQL, GRANT command is used to

grant system privileges, roles, and object privileges to uses and roles
allow user to access databases
allow user to create databases
None of the listed here

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

Insert
None of these
Delete
Look-up
All of these

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