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Introduction to SQL

Introduction to SQL
Which of the following SQL commands can be used to add data to a database table?

INSERT
UPDATE
APPEND
ADD

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Introduction to SQL
Which of the following is a SQL aggregate function?

LEFT
JOIN
LEN
AVG

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Introduction to SQL
Find all the cities whose humidity is 89

SELECT city WHERE humidity = 89;
SELECT city FROM weather WHERE humidity = 89;
SELECT city FROM weather;
SELECT humidity = 89 FROM weather;

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

None of these
QUERY
READ
SELECT

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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.

ONLY
DISTINCT
UNIQUE
SINGLE

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Introduction to SQL
The SQL statementSELECT ROUND(45.926, -1) FROM DUAL;

prints 50
is illegal
prints garbage
prints 045.926

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