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Introduction to Database System

Introduction to Database System
Which of the following products implemented the CODASYL DBTG model?

R:base
IDMS
dBase-II
DB2

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

True
False

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Introduction to Database System
The highest level in the hierarchy of data organization is called

data record
data bank
database
data file

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Introduction to Database System
In SQL, which command is used to select only one copy of each set of duplicable rows

None of these
SELECT UNIQUE
SELECT DISTINCT
All of these
SELECT DIFFERENT

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

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

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Introduction to Database System
The following are functions of a DBMS except ________ .

administrating databases
creating and processing forms
processing data
creating databases

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