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Introduction to Database System

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
Sort/report generators

none of the listed here
require more disk space than index/report generators
do not need to sort before generating a report
are faster than index/report generators

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Introduction to Database System
Entities of a given type are grouped into a(n):

database.
attribute.
entity class.
ER

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Introduction to Database System
A subtype entity is a special case of another entity called a supertype entity.

False
True

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Introduction to Database System
The data dictionary tells the DBMS

All of the listed here
what attribute are possessed by the data
what these files contain
what files are in the database

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Introduction to Database System
In SQL, which command is used to create a database user?

All of the listed here
MK USER
CREATE USER
ADD USER TO DATABASE

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