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Introduction to Database System

Introduction to Database System
Keys made up of two or more attributes are called composite keys.

False
True

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Introduction to Database System
Which of the following contains a complete record of all activity that affected the contents of a database during a certain period of time?

query language
None of these
transaction log
data manipulation language
report writer

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Introduction to Database System
Entities of a given type are grouped into a(n):

entity class.
database.
ER
attribute.

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Introduction to Database System
Which command is used to remove a table from the database in SQL?

DELETE TABLE
DROP TABLE
ERASE TABLE
UNATTACH TABLE

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Introduction to Database System
A _____ means that one record in a particular record type is related to only one record of another record type.

One-to-many relationship
One-to-one relationship
None of these
Many-to-many relationship
Many-to-one relationship

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Introduction to Database System
To have a file hold a list, it is necessary to

identify the name, width and type of the fields of each record.
identify the records in the list
All of the listed here
decide which fields will be used as sort or index keys

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