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Introduction to SQL

Introduction to SQL
The result of every SQL query is a table.

True
False

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Introduction to SQL
The command to remove rows from a table 'CUSTOMER' is:

DROP FROM CUSTOMER ...
DELETE FROM CUSTOMER WHERE ...
UPDATE FROM CUSTOMER ...
REMOVE FROM CUSTOMER ...

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

EXISTS operator
None of these
NOT operator
IS NULL operator

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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.

DISTINCT
UNIQUE
SINGLE
ONLY

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Introduction to SQL
Which SQL keyword is used to retrieve a maximum value?

MOST
TOP
UPPER
MAX

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Introduction to SQL
The SQL statement that queries or reads data from a table is ________ .

QUERY
SELECT
None of these
READ

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