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Introduction to SQL

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

COMMIT
TRUNCATE
DELETE
ROLLBACK

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Introduction to SQL
ORDER BY can be combined with the SELECT statements.

True
False

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

True
False

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Introduction to SQL
The SELECT command, with its various clauses, allows users to query the data contained in the tables and ask many different questions or ad hoc queries.

False
True

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Introduction to SQL
In SQL, which command(s) is(are) used to change a table's storage characteristics?

CHANGE TABLE
ALTER TABLE
MODIFY TABLE
All of these

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Introduction to SQL
DISTINCT and its counterpart, ALL, can be used more than once in a SELECT statement.

False
True

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