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Introduction to SQL

Introduction to SQL
SUM, AVG, MIN, and MAX can only be used with numeric columns.

True
False

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Introduction to SQL
Scalar aggregate are multiple values returned from an SQL query that includes an aggregate function.

True
False

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

JOIN
DELETE
SELECT
INSERT

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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
A subquery in an SQL SELECT statement is enclosed in:

CAPITAL LETTERS.
brackets -- [...].
braces -- {...}.
parenthesis -- (...) .

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Introduction to SQL
SQL is a programming language.

True
False

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