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Introduction to Database System

Introduction to Database System
In SQL, which command is used to changes data in a table?

INSERT
BROWSE
APPEND
UPDATE

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Introduction to Database System
Data encryption techniques are particularly useful for

All of these
reducing storage space requirements
protecting data in data communication systems
improving data integrity
None of these

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Introduction to Database System
An on-line commercial site such as Amazon.com is an example of a(n) ________ .

data mining database application
single-user database application
e-commerce database application
multiuser database application

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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
Structured Query Language (SQL) is an internationally recognized standard language that is understood by all commercial database management system products.

True
False

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Introduction to Database System
A database is called "self-describing" because it contains a description of itself.

True
False

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