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Introduction to Database System

Introduction to Database System
In SQL, the _____ command is used to recompile a view

CREATE VIEW
COMPILE VIEW
ALTER VIEW
None of these
DEFINE VIEW

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Introduction to Database System
A data dictionary is a special file that contains

the widths of all fields in all files
the names of all fields in all files
None of these
the data types of all fields in all files
All of these

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Introduction to Database System
In SQL, which command(s) is(are) used to enable/disable all triggers on a table?

ALTER TABLE
MODIFY TRIGGERS IN TABLE
All of the listed here
ALTER TRIGGERS

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

True
False

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Introduction to Database System
Relationship classes are associations between entity classes.

True
False

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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.

None of these
Delete
Sort Key
Update
Index

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