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Introduction to Database System

Introduction to Database System
The DBMS that is most difficult to use is ________ .

Microsoft's SQL Server
Microsoft's Access
IBM's DB2
Oracle Corporation's Oracle

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Introduction to Database System
Which of the following is not a logical data-base structure?

network
chain
relational
tree

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Introduction to Database System
The logical data structure with a one-to-many relationship is a

network
tree
relational
chain

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Introduction to Database System
An identifier typically uses more than one attribute.

True
False

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Introduction to Database System
A ____ Contains the smallest unit of meaningful data, so you might call it the basic building block for a data file.

Database
Records
Fields
File structure

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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

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

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