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Introduction to SQL

Introduction to SQL
A SELECT statement within another SELECT statement and enclosed in square brackets ([...]) is called a subquery.

False
True

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

INSERT
DELETE
JOIN
SELECT

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

False
True

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Introduction to SQL
Data manipulation language (DML) commands are used to define a database, including creating, altering, and dropping tables and establishing constraints.

True
False

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Introduction to SQL
The SQL WHERE clause:

limits the row data are returned.
limits the column data that are returned.
Neither A nor B are correct.
Both A and B are correct.

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Introduction to SQL
COUNT(field_name) tallies only those rows that contain a value; it ignores all null values.

False
True

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