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Introduction to Database System

Introduction to Database System
Which command(s) is(are) used to redefine a column of the table in SQL ?

all of the listed here
DEFINE TABLE
MODIFY TABLE
ALTER TABLE

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Introduction to Database System
If attributes A and B determine attribute C, then it is also true that:

A →
C is a determinant.
(A,B) is a composite determinant.
B →

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Introduction to Database System
A relation has cells that hold multi-value entries.

True
False

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Introduction to Database System
The degree of a relationship refers to the number of entity classes in the relationship.

False
True

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Introduction to Database System
If the record management system allows you to edit values before they are recorded on disk, you can

change the name of a field
correct spelling changes before they are recorded
change the width of a field
All of the listed here

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

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

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