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Introduction to SQL

Introduction to SQL
Most companies keep at least two versions of any database they are using.

False
True

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Introduction to SQL
There is an equivalent join expression that can be substituted for all subquery expressions.

False
True

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Introduction to SQL
ON UPDATE CASCADE ensures which of the following?

Data Integrity
Normalization
All of these
Materialized Views

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Introduction to SQL
SQL can be used to:

create database structures only.
query database data only.
All of these
modify database data only.

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Introduction to SQL
Which of the following is valid SQL for an Index?

CHANGE INDEX ID;
REMOVE INDEX ID;
CREATE INDEX ID;
ADD INDEX ID;

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Introduction to SQL
Which of the following command makes the updates performed by the transaction permanent in the database?

COMMIT
ROLLBACK
DELETE
TRUNCATE

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