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Introduction to Database System

Introduction to Database System
The files stored on a secondary stage device are composed of a hierarchy of data. What does a record in a file contain?

Characters
Data field
None of the listed here
Bits

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Introduction to Database System
In a relational schema, each tuple is divided into fields called

Relations
Domains
Queries
All of the listed here

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Introduction to Database System
Which command is used to select distinct subject (SUB) from the table (BOOK)?

SELECT ALL FROM BOOK
SELECT DISTINCT SUB FROM BOOK
All of these
SELECT SUB FROM BOOK
None of these

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Introduction to Database System
You have run an SQL statement that asked the DBMS to display data in a table named USER_TABLES. The results include columns of data labeled "TableName," "NumberOfColumns" and "PrimaryKey." You are looking at ________ .

user data
A report
metadata
indexes

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Introduction to Database System
In which of the following is a single-entity instance of one type of related to a single-entity instance of another type?

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

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Introduction to Database System
One data dictionary software package is called

None of these
DB/DC dictionary
any of the above
TOTAL
ACCESS

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