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Introduction to SQL

Introduction to SQL
'AS' clause is used in SQL for

Join operation.
Rename operation.
Selection operation.
Projection operation.

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Introduction to SQL
The SQL keyword BETWEEN is used:

None of these
to limit the columns displayed.
as a wildcard.
for ranges.

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Introduction to SQL
SQL data definition commands make up a(n) ________ .

DML
XML
DDL
HTML

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Introduction to SQL
The benefits of a standard relational language include which of the following?

Applications are not needed
All of these
Increased dependence on a single vendor
Reduced training costs

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Introduction to SQL
Which command undo all the updates performed by the SQL in the transaction?

DELETE
COMMIT
TRUNCATE
ROLLBACK

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Introduction to SQL
What operator tests column for the absence of data?

None of these
NOT operator
EXISTS operator
IS NULL operator

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