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Introduction to SQL

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

DELETE
SELECT
INSERT
JOIN

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Introduction to SQL
To establish a range of values, < and > can be used.

True
False

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

DELETE
TRUNCATE
COMMIT
ROLLBACK

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

False
True

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Introduction to SQL
SQL provides the AS keyword, which can be used to assign meaningful column names to the results of queries using the SQL built-in functions.

False
True

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Introduction to SQL
Most companies keep at least two versions of any database they are using.

True
False

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