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Introduction to Database System

Introduction to Database System
The primary key is selected from the:

composite keys.
determinants.
candidate keys.
foreign keys.

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Introduction to Database System
For some relations, changing the data can have undesirable consequences called:

transitive dependencies.
modification anomalies.
normal forms.
referential integrity constraints.

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Introduction to Database System
In a relation, the order of the columns does not matter.

True
False

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Introduction to Database System
Which of the following is not an advantage of the data-base approach?

All of these
increased security
elimination of the data redundancy
ability to associate related data
program/data independence

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Introduction to Database System
In which of the following can many entity instances of one type be related to many entity instances of another type?

One-to-One Relationship
One-to-Many Relationship
Many-to-Many Relationship
Composite Relationship

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Introduction to Database System
Which of the following is not characteristic of a relational database model?

treelike structure
tables
complex logical relationships
records

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