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Introduction to Database System

Introduction to Database System
An entity class is a collection of entities and is described by the structure of the entities in that class.

False
True

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Introduction to Database System
Entities can be associated with one another in which of the following?

Entities
Relationships
Identifiers
Attributes

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Introduction to Database System
Structured Query Language (SQL) is an internationally recognized standard language that is understood by all commercial database management system products.

False
True

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Introduction to Database System
Which command(s) is(are) used to enable/disable/drop an integrity constraint in SQL?

ALTER TABLE
DEFINE TABLE
MODIFY TABLE
All of the listed here

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Introduction to Database System
If you want to organize a file in multiple ways, it is better to _____ the data rather than to sort it.

Update
None of these
Delete
Sort Key
Index

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Introduction to Database System
In any hierarchy of data organization, the smallest entity to be processed as a single unit is called

database
data record
data field
data file
None of these

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