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Introduction to Database System

Introduction to Database System
Which of the following refers to something that can be identified in the user's work environment, something that the users want to track?

Relationship
Identifier
Entity
Attribute

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Introduction to Database System
A minimum cardinality is the minimum number of entity instances that may participate in a relationship instance.

True
False

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Introduction to Database System
A recursive relationship is a relationship between an entity and ________ .

itself
an instance entity
an archetype entity
a subtype entity

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Introduction to Database System
The language used in application programs to request data from the DBMS is referred to as the

query language
DML
All of the listed here
DDL

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Introduction to Database System
The physical location of a record is determined by a mathematical formula that transforms a file key into a record location in

a tree file
None of these
an indexed file
a sequential file
a hashed file

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Introduction to Database System
In SQL, which command is used to add a column/integrity constraint to a table

ALTER TABLE
INSERT COLUMN
MODIFY TABLE
ADD COLUMN

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