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Introduction to SQL

Introduction to SQL
A dynamic view is one whose contents materialize when referenced.

True
False

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Introduction to SQL
Count function in SQL returns the number of

groups.
values.
columns.
distinct values.

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Introduction to SQL
To remove duplicate rows from the results of an SQL SELECT statement, the ________ qualifier specified must be included.

SINGLE
ONLY
UNIQUE
DISTINCT

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

NOT operator
IS NULL operator
EXISTS operator
None of these

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Introduction to SQL
Which of the following SQL commands is used to retrieve data?

DELETE
JOIN
INSERT
SELECT

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Introduction to SQL
Which of the following group functions ignore NULL values?

SUM
COUNT
All of these
MAX

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