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Introduction to Database System

Introduction to Database System
Which of the following is a group of one or more attributes that uniquely identifies a row?

Key
Determinant
Tuple
Relation

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Introduction to Database System
Because it contains a description of its own structure, a database is considered to be ________ .

an application program
described
self-describing
metadata compatible

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Introduction to Database System
In SQL, which command(s) is(are) used to enable/disable all triggers on a table?

MODIFY TRIGGERS IN TABLE
ALTER TRIGGERS
ALTER TABLE
All of the listed here

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Introduction to Database System
Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that:

A → (B,C).
A →
A →
(B,C) →

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

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

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Introduction to Database System
Data security threats include

privacy invasion
all of the listed here
fraudulent manipulation of data
hardware failure

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