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Introduction to Database System

Introduction to Database System
In a relation, the columns are sometimes called "attributes".

False
True

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Introduction to Database System
Which of the following products was the first to implement true relational algebra in a PC DBMS?

Oracle
dBase-II
R:base
IDMS

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Introduction to Database System
Relationship classes are associations between entity classes.

False
True

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Introduction to Database System
A report form

None of these
appears on the computer monitor during data entry
All of these
both (a) and (b)
is used during report generation to format data

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Introduction to Database System
One of the reasons why OODBMSs have not been widely used for business information systems is that OOP is obsolete.

True
False

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Introduction to Database System
Two files may be joined into a third file if

both (b) and (c)
they have no records with the same value in the common field
None of these
they have a field in common
they have a row in common

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