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Introduction to Database System

Introduction to Database System
A candidate key is a determinant that determines all the other columns is a relation.

True
False

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Introduction to Database System
A file produced by a spreadsheet

all of the listed here
is generally stored on disk in an ASCII text format
can be used as it by the DBMS
can be used for graphic

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Introduction to Database System
One solution to the multivalued dependency constraint problem is to:

create a new theme.
add a composite key.
split the relation into two relations, each with a single theme.
change the theme.

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Introduction to Database System
SQL stands for ________ .

Sequential Query Language
Structured Question Language
Structured Query Language
Sequential Question Language

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Introduction to Database System
In SQL, which command(s) is(are) used to enable/disable a database trigger?

MODIFY USER
CHANGE USER
All of the listed here
ALTER TRIGGER

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Introduction to Database System
A key:

identifies a row.
must always be composed of two or more columns.
can only be one column.
identifies a column.

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